CN100445066C - Spiral mould - Google Patents
Spiral mould Download PDFInfo
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- CN100445066C CN100445066C CNB2004100716802A CN200410071680A CN100445066C CN 100445066 C CN100445066 C CN 100445066C CN B2004100716802 A CNB2004100716802 A CN B2004100716802A CN 200410071680 A CN200410071680 A CN 200410071680A CN 100445066 C CN100445066 C CN 100445066C
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- spiral
- rotating ring
- mould
- mold
- die ontology
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Abstract
The present invention provides a spiral mold which is formed as follows and is adapted to various kinds of melting resin and extrusion conditions. The spiral mold can make resin flowing in evenly spread and formed around the spiral mold to obtain an equal and even tubular body, a non-extension thin film and an extension thin film formed by blow molding and a functional thin film. The present invention is characterized in that a core rod (2) with the outer surface having a spiral groove (3) is pressed and embedded in a mold body (1); in addition, a rotating ring (5) which has the desired width and can freely rotate is arranged along the periphery surface of the spiral groove (3) on the corresponding part between the initial part and the end part of the spiral groove (3) within the local scope of a mold cylinder part forming the inner surface of the mold body (1).
Description
Technical field
The present invention relates to be suitable for spiral mould with extrusion moulding moulding tubular body.
Background technology
As the existing mould of using with extrusion molding moulding tubular body, not too use the profiled holes extrusion die that produces pelmatogram again and again and, cause the straight mould of wall unevenness easily, and how shown in Fig. 4 (a) and (b), on the outer surface of the plug 2 in inserting die ontology 1 helicla flute 3 is set, to introduce in the plug through inflow entrance 31 by the extruder molten resin supplied, punish into 2～8 the tunnel at distributary division 32, make it to flow to die lip (right-hand member of figure) through helicla flute 3.Example as prior art, can list such structure, promptly, helicla flute 3 shoals gradually from the front end terminad, molten resin part in the process that moves in helicla flute is transferred between mould tube inner surface and the plug, (forming part: the rectification die lip clearance portion) is laminar condition and arrives die lip through taking portion 33 (with reference to Fig. 4 (b)) and line part in.According to purposes, also use sometimes and do not take the spiral mould (with reference to Fig. 4 (a)) of portion in.
Except above-mentioned spiral mould, impartial and even in order to make die lip exit fusion macromolecule, existing various so far scheme proposes.
1) when making the porous tubing of high visco-elastic material, for making the adhesion that cuts the wire drawing diffusion behind the dish or make material powder, crosslinkedly material between tube, the plug being carried out frictional heat when needing intensification.This frictional heat is realized by tube whole zone revolution.Disclosed hereinly be " can relative the rotation and constitute with extrusion die and article shaped; rotation can be continuous also can be vibration, by the characteristic that the mode and the degree of rotation are controlled article shaped " (with reference to Fig. 5) a kind of like this scheme (for example can with reference to list of references 1: the spy opens flat 8-57936 communique).
When 2) carrying out the extrusion molding of tubing, the correction of wall thickness is carried out by means of gap and the circumferencial direction temperature difference detected value that mould and rotatable off-centre connect between the cover (plug), and be, " with; have and make mould and connect resin fluid path between the cover eccentric heading joint cover except that front end; and; the temperature sensor that the circumferential resin temperature in resin fluid path is detected; said mould or connect a certain of cover can be around the axle center rotation, and the anti-wall unevenness extrusion device that constitutes " (with reference to Fig. 6) a kind of like this scheme open (for example can with reference to list of references 2: the spy opens clear 59-9035 communique).
3) scheme of " when making multilayer laminated thing with different materials; for the material that is assigned with, form leakage flow from the groove of a plurality of screw fluids path; by making the plug rotation that is provided with spiral, will be stacked sequentially by the molten resin flow that different resins forms " (with reference to Fig. 7) discloses (for example can with reference to list of references 3: the spy opens flat 10-29237 communique).
Usually, as die ontology, along the molten resin flow that moves of tube inwall (below be called advection) and the molten resin flow that in helicla flute, moves (below be called spiral flow), be on amount, to keep certain balance and move to die lip, and this balance is extremely important, if lose this balance, can cause the tubular body bad order, streak, unshapeliness, wall unevenness, wrinkle, the unequal defective of intensity appear.
The appropriate balance of advection and spiral flow is determined by helicla flute groove width, groove depth, pitch etc. from experience.But, the appropriate balance of each stream, also can change because of the flow of molten resin, temperature, viscoplasticity etc., owing to do not have the suitable means that to tackle its variation, can produce weld mark again and again, to then need to improve temperature and reduce viscoplasticity by the mixing this point of avoiding, so produce wall unevenness, pollute die lip problems such as (mold marks) because of the resin heat ageing.
Be intended to be shaped to target shape through the macromolecular material of melting mixing and the mould that uses, round mould and flat-die are arranged with extruder.
With the circle mold forming, can list film, tubing, propel the price of container, the tubular body of net etc., except with the fusion macromolecule extruded from die lip the occasion of shape difference on the same circumference as its purpose, the performance of mould all can produce a very large impact the quality of profiled member.Unequal when shape on same circumference, when quality is inhomogeneous, can cause (first) wall unevenness, (second) bad order (weld mark, streak, unshapeliness, wrinkle), (third) intensity inequality, (fourth) electric property unequal.Have, carry out the not occasion of the conversion of homogeneous raw material at needs, the displacement that exists helicla flute part etc. such as is difficult for carrying out, conversion time is long, transition loss is big at problem.
About material flowing in mould, as the viscoplasticity of material character except relevant with temperature, pressure, also can change because of flow, therefore, to the control device that flows and control, must not fixing but variable, and from the rectification consideration of a kind of functional requirement that the line part (forming part) near mould is proposed, preferably Gu Ding control device.
Here said weld mark (fusion streakline) is meant, when the molten resin flow after flowing in helicla flute collaborates, because of not reaching thin lines impartial, that evenly produce, i.e. " trace line ".
Even in aforementioned prior art (spiral mould shown in Fig. 4 (a) and (b) and list of references 1～3), the problems referred to above are not resolved as yet yet.
Summary of the invention
The present invention proposes in view of above-mentioned condition, its objective is, a kind of like this spiral mould is provided, promptly, make the inflow resin scatter moulding around equably, obtain non-extension and extension film and function film very impartial, tubular body, blow molding uniformly, and adapt to multiple molten resin, extrusion condition.
Thereby the present invention has following formation can be addressed the above problem.
(1) a kind of spiral mould of following formation, in die ontology inside, outer surface has the spiral fluted plug and is embedded in wherein, and, in the subrange of the mould tube portion of the inner surface that forms die ontology, and and the spiral fluted start-up portion is to corresponding position between the latter end, install along said spiral fluted outer peripheral face and to have desired width dimensions, the rotating ring that can rotate freely, employed raw material is leaked and as lubricant to the adjacent sliding position of rotating ring and die ontology, and be provided with, have the needle-valve that to regulate delivery flow, has the output mechanism that this lubricant can be discharged the outer fluid path of machine.
(2) (1) said spiral mould as described above, said rotating ring can be controlled in below the rotating speed 60rpm its rotation.
(3) (1) said spiral mould as described above, the inner surface of said rotating ring is minute surface (a certain based on the value of JIS B 0601-1976: 0.1S～6.3S), asperities (the pears skin shape degree of depth 4 μ～150 μ), odontoid face (flat odontoid, helical tooth shape) in the surface roughness standard.
Annotate: above-mentioned value 0.1S based on JIS (Japanese Industrial Standards) represents that the average distance between the adjacent crest of both measured length inside surface roughnesses is 0.1mm.
Description of drawings
Fig. 1 is the key diagram that the formation of the key component of spiral mould involved in the present invention is showed, (a) is to schematically illustrate figure to what the state of rotating ring and pinion was showed, (b) is cutaway view.
Fig. 2 is the stereogram of rotating ring involved in the present invention.
Fig. 3 (a) and (b), (c) are the key diagrams of example of showing the castellated shape of rotating ring inner surface.
Fig. 4 is the cutaway view that spiral mould is used in the tubular body moulding in the prior art example, (a) is not have to take the person of portion in, is to take the person of portion in (b).
Fig. 5 is the cutaway view of the related key component of the list of references 1 in the prior art example.
Fig. 6 is the cutaway view of the related key component of the list of references 2 in the prior art example.
Fig. 7 is the cutaway view of the related key component of the list of references 3 in the prior art example.
Fig. 8 illustrates, the curve of outward appearance (thickness inequality) situation of the film shape profiled member that the reflection rotating ring is not made under the rotating condition.
Fig. 9 illustrates, the curve of outward appearance (thickness inequality) situation of the film shape profiled member of making under the reflection rotating ring right rotation condition.
Figure 10 illustrates, the curve of outward appearance (thickness inequality) situation of the film shape profiled member of making under the reflection rotating ring anticlockwise condition.
The specific embodiment
Below, the form of implementation to spiral mould involved in the present invention describes in conjunction with the accompanying drawings.
As shown in Figure 1, the spiral mould that is suitable for extrusion molding moulding tubular body involved in the present invention, it is characterized in that, with, inside at die ontology 1, outer surface has plug 2 helicla flute 3, that flange portions 2a is integrally formed with it and is pressed into and is embedded in wherein, and, in the subrange of the mould tube portion of the inner surface that forms die ontology 1 and the start-up portion of helicla flute 3 between the latter end, outer peripheral face installation along said helicla flute 3 has rotating ring 5 desired width dimensions, that can rotate freely, and constitutes.Said flange portions 2a is connected on the extruder, the molten resin from extruder can be fed to helicla flute 3 from inflow entrance 31 through distributary division 32.
Be arranged on the degree of depth of the helicla flute 3 on the outer surface of plug 2, shoal gradually between to terminal, and link to each other with portion of taking in 33 and the line part that between the inner surface of plug 2 and die ontology 1, forms in starting point.
Rotating ring 5 has the molten resin flow of making appropriateness dispersion in a circumferential direction and impartial, the uniform function that becomes, can be according to selection forward and backward direction of rotation and rotating speeds such as properties of materials, extrusion conditions.
Can rotate the rotating ring 5 of (rotating freely) freely, it is characterized in that, its rotation is can be controlled in below the rotating speed 60rpm, the inner surface 5b of the rotating ring 5 that can rotate freely, be minute surface 0.1S～6.3S, the 0.1～1.6S preferably in the surface roughness standard (JIS B 0601-1976), the pears skin shape degree of depth is 4 μ～150 μ, the asperities of 4 μ～50 μ preferably, perhaps, and a certain (with reference to Fig. 3 (a) and (b), (c)) of odontoid face (flat odontoid, helical tooth shape).
For the surface roughness of the inner surface 5b of this rotating ring 5, can select according to the requirement of the distribution degree that can obtain appropriateness according to properties of materials, extrusion condition etc.
Rotating ring 5 has the tooth 5a of formative gear on its outer peripheral face, and that the pinion 4 with the tooth 4a that meshes with this tooth 5a has more than 3 is a plurality of, obtains the support of a 4b on die ontology 1, can rotate freely by means of said pinion 4.By a plurality of pinions more than 3 are set, can guarantee that axis of rotation has good precision.
It is characterized in that having on the outer surface on the plug 2 of helicla flute 3, in the end of helicla flute 3 and the line part of die lip 2b (forming part: be provided with the portion of taking in 33 the die lip clearance portion).Make the portion's of taking in 33 sizes suitably, help further to improve the rectification that flows into resin.
For preventing rotating ring 5 sintering, employed raw material is leaked and as lubriation material to rotating ring 5 and die ontology 1 adjacent sliding position, be provided with and have the output mechanism that this lubriation material can be discharged the outer fluid path 6 of machine.This output mechanism has needle-valve and can delivery flow be regulated, and has cooling fan in the discharge pipe periphery, outside the cooled lubricant discharge machine that is made of the use material.
Width dimensions for rotating ring 5, can be with the spiral fluted start-up portion, be to determine it after back segment part etc. after the end portion of leading portion part before the starting point of helicla flute 3 and helicla flute 3 is reserved surplus, also can be designed to, with helicla flute 3 corresponding position minimum widiths set on the outer surface of plug 2 be that " pitch+groove width ", Breadth Maximum are " from starting point to terminal ", can satisfy requirement as best inscape.
For the hear resistance under lubricated, the high temperature extrusion temperature of the sliding part between rotating ring 5 and other position requirement is arranged, in material, sneak into atypical lubricant, the molten resin that leakage rate is controlled as lubricant introduce rotating ring 5 outer peripheral face and with the corresponding die ontology 1 in the position, both sides of tooth 5a in sliding surface in the set cannelure (below be called bearer ring), outside sealing system, discharge.
Embodiment under the different condition is shown below and is described.
Spiral mould involved in the present invention is installed in the manufacturing of carrying out the polypropylene blow moulding form film on the extruder.
＜device specification 〉
Screw rod outer diameter D=φ the 50mm of extruder, screw rod effective length L=1433mm, L/D=28, flight pitch is fixing 50 millimeters, and screw compression is than 3.8, and spiral mould exports bore φ 155mm, air ring internal diameter 300mm possesses air ring, steadying plate, pinch roll and finished product coiling machine.
(implementing test 1)
Use blow molding raw material (acrylic resin), temperature conditions is 200 ℃ of extruders, 200 ℃ of heads, 200 ℃ on mould, and extrusion capacity 33kg/h pulls out speed 30m/min, spiral mould shown in Figure 1 is installed, is stably produced the blow molding film of thin-film width 320mm, thickness 30 μ.
＜implementation condition 1A 〉
Under rotating ring 5 fixed situations, make film.Carry out the adjustment of thickness after the system film is stable.
＜implementation condition 1B～4B 〉
[table 1]
Explain:
1) direction of right rotation is identical with the hand of spiral of spiral mould.
2) direction of anticlockwise is opposite with the hand of spiral of spiral mould.
(implementing test 2)
Make blow molding with the material of mixing 1% pigment in the raw material (below be called coloured material) 15kg, it is got 5kg at every turn extrude, afterwards, the material (below be called not coloured material) of pigment 0% is flowed in wherein.At this moment, the not coloured material consumption under rotating ring operation and the off-duty situation is measured.
Illustrate below and implement the test comparing result.
[table 2]＜Comparative Examples 1 〉
Fig. 8 (the implementation condition 1A uneven situation of thickness of the film of formation down is shown)
Fig. 9 (the implementation condition 1B uneven situation of thickness of the film of formation down is shown)
Figure 10 (the implementation condition 3B uneven situation of thickness of the film of formation down is shown)
In Fig. 8～Figure 10, transverse axis X is the length direction of film, and longitudinal axis Y illustrates the variation of thickness (μ).
(conclusion)
1) as shown in Table 2, when rotating ring under the implementation condition 1A fixedly the time, produced weld mark, when finished product was wound up on the paper tube, the coiling attitude degenerated gradually.
2) whether rotate its difference as a result, the outward appearance of coiling attitude obviously will be got well during rotation.
3) as shown in Table 2, during rotation, the very fast person of the rotating speed attitude of reeling is better.
4) curve of Fig. 8, the localized membrane thickness ununiformity is remarkable.
5) curve of Fig. 9, office cuts open the thickness inequality and alleviates, and the effect of improvement is arranged.
6) there is not the tendency of localized membrane thickness ununiformity in the curve of Figure 10, and the affirmation state is suitable.
[table 3]＜Comparative Examples 2 〉
1) extrusion capacity is 15kg/ hour, when not rotating, needs about 40 minutes to the color disappearance.
2) extrusion capacity be 15kg/ hour, during right rotation, disappearing to color needs about 20 minutes.
3) extrusion capacity be 15kg/ hour, during anticlockwise, disappearing to color needs about 14 minutes.
4) compare when not rotating, during rotation, approximately need half the time to get final product.
5) compare with right rotation, the consumption of coloured material is not few during anticlockwise.
(effect evaluation method)
＜estimate 1 〉
Under the same conditions, the stability of system film, the coiling attitude when tightly being wound on finished product on the paper tube are carried out visualization.Simultaneously, the thickness of making film is measured continuously.
＜estimate 2 〉
Under the same conditions, consumption and the time to the conversion of coloured material compares.
(evaluation result)
＜evaluation result 1 〉
As a comparison case 1, by table 2 and Fig. 8～10 rotating ring effect of rotating as can be known.
＜evaluation result 2 〉
As a comparison case 2, the effect of its colour changing has also obtained good effect because of the rotating ring operation as can be known, as can be known with respect to the hand of spiral of spiral mould to opposite spin person, better effects if.
As described above, can provide a kind of with spiral mould of the present invention, make and flow into the impartial around distribution moulding of resin, obtain non-extension and extension film and function film very impartial, tubular body, blow molding uniformly, and, can adapt to the spiral mould of multiple molten resin, extrusion condition.
Claims (3)
1. spiral mould, it is characterized in that following formation: outer surface has the spiral fluted plug and is embedded in die ontology inside, and, subrange in the mould tube portion of the inner surface that forms die ontology, and and the spiral fluted start-up portion is to corresponding position between the latter end, along said spiral fluted outer peripheral face the rotating ring with desired width dimensions can be installed rotationally freely, employed raw material is leaked and as lubricant to the adjacent sliding position of rotating ring and die ontology, and be provided with and have the needle-valve that to regulate delivery flow and have the output mechanism that this lubricant can be discharged the outer fluid path of machine.
2. as the said spiral mould of claim 1, it is characterized in that the rotation that can control said rotating ring is below rotating speed 60rpm.
3. as the said spiral mould of claim 1, it is characterized in that the inner surface of said rotating ring is the minute surface with 0.1S～6.3S in the surface roughness standard, odontoid face a certain with the pears skin shape degree of depth 4 μ～asperities of 150 μ, flat odontoid or helical tooth shape.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100716802A CN100445066C (en) | 2004-07-21 | 2004-07-21 | Spiral mould |
| HK06106156.1A HK1086224A1 (en) | 2004-07-21 | 2006-05-26 | Spiral die assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100716802A CN100445066C (en) | 2004-07-21 | 2004-07-21 | Spiral mould |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1724236A CN1724236A (en) | 2006-01-25 |
| CN100445066C true CN100445066C (en) | 2008-12-24 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100716802A Expired - Fee Related CN100445066C (en) | 2004-07-21 | 2004-07-21 | Spiral mould |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN100445066C (en) |
| HK (1) | HK1086224A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106040043B (en) * | 2016-07-25 | 2019-03-05 | 广东利拿实业有限公司 | A kind of Improvement type mixing case and the kneading machine with Improvement type mixing case |
| CN106040044B (en) * | 2016-07-25 | 2019-03-05 | 广东利拿实业有限公司 | A kind of Improvement type mixing case |
| CN108115952A (en) * | 2017-12-04 | 2018-06-05 | 江苏飞博尔新材料科技有限公司 | The manufacturing equipment and its method of a kind of long bolt |
| JP7024599B2 (en) * | 2018-05-23 | 2022-02-24 | セイコーエプソン株式会社 | Thermoplastic equipment, injection molding machine and modeling equipment |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS599035A (en) * | 1982-07-09 | 1984-01-18 | Furukawa Electric Co Ltd:The | Extrusion method and apparatus for molding suppressing eccentricity in thickness |
| CN2210777Y (en) * | 1994-08-23 | 1995-10-25 | 青岛市高科技工业园远东塑料工程有限公司 | Single-screw exhausting-type extruder |
| JPH1029237A (en) * | 1996-07-16 | 1998-02-03 | Kureha Chem Ind Co Ltd | Spiral die and manufacture of laminate by using the die |
| DE19850401A1 (en) * | 1997-05-09 | 2000-05-04 | Werner Toepler | Extrusion plant for producing pipe and sewer linings moves through the pipeline and has two processing screws feeding an annular die with a cooling core |
-
2004
- 2004-07-21 CN CNB2004100716802A patent/CN100445066C/en not_active Expired - Fee Related
-
2006
- 2006-05-26 HK HK06106156.1A patent/HK1086224A1/en not_active IP Right Cessation
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS599035A (en) * | 1982-07-09 | 1984-01-18 | Furukawa Electric Co Ltd:The | Extrusion method and apparatus for molding suppressing eccentricity in thickness |
| CN2210777Y (en) * | 1994-08-23 | 1995-10-25 | 青岛市高科技工业园远东塑料工程有限公司 | Single-screw exhausting-type extruder |
| JPH1029237A (en) * | 1996-07-16 | 1998-02-03 | Kureha Chem Ind Co Ltd | Spiral die and manufacture of laminate by using the die |
| DE19850401A1 (en) * | 1997-05-09 | 2000-05-04 | Werner Toepler | Extrusion plant for producing pipe and sewer linings moves through the pipeline and has two processing screws feeding an annular die with a cooling core |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1724236A (en) | 2006-01-25 |
| HK1086224A1 (en) | 2006-09-15 |
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