CN103687714A - Clip for stretching a film - Google Patents
Clip for stretching a film Download PDFInfo
- Publication number
- CN103687714A CN103687714A CN201180071534.8A CN201180071534A CN103687714A CN 103687714 A CN103687714 A CN 103687714A CN 201180071534 A CN201180071534 A CN 201180071534A CN 103687714 A CN103687714 A CN 103687714A
- Authority
- CN
- China
- Prior art keywords
- fixture
- lateral
- main body
- body portion
- jig main
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- 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
- B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
- B29C55/02—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
- B29C55/20—Edge clamps
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
Abstract
The supporting clip according to the invention comprises a main clip body (7) having an inner side flange (7a) rigidly connected to a top transverse flange (7b) that has top rollers (9, 11, 12) capable of rolling on the surfaces of a guide rail of a strip-stretching machine. A clip bottom (8) is mounted onto the main clip body (7), and has bottom rollers (15, 17, 18) capable of rolling on the side surfaces of the guide rail. A strip-clamping means (14) makes it possible to hold an edge of a strip (2) of material along an inner side (5) of the clip body (7). The top transverse flange (7b) is flat and free of outer flaps such that the cross-section of the main clip body (7) has the general shape of an inverted "L". The clip bottom (8) is flat and free of outer flaps. A lightweight clip which efficiently removes greasy residue can thus be produced.
Description
Technical field
The present invention relates to a kind of transversal stretching device for the production of thin plastic.
Background technology
The method of producing thin plastic is included in the hot cross directional stretch step of carrying out in large scale baking box.When the described baking box of film process, two serial fixtures that described film is distributed in the longitudinal direction by two lateral edge along film stretch.Described fixture comprises the clamping device being arranged on fixture body, and this fixture body itself is equipped with slip or the rolling member arranging against fixing guide rail.Therefore, in baking box, there are two guide rails, for supporting, keep two serial fixtures of two lateral edge of film.Two chain bands drive each fixture along the movement of guide rail, to vertically move film, pass through baking box.
In the first area of baking box, parallel track extends, until film reaches suitable softening temperature.After this, Orbital Symmetry ground is separately with cross directional stretch film.After stretching, described guide rail again parallel and film is cooled.
In stretching device, in order to reach sufficiently high productivity ratio, the speed that fixture and film are advanced surpasses 500m/min.
During this moves, need on the interface between fixture body and track, lubricate described slip or rolling member.Especially, the in the situation that of ball bearing, need to be lubricated.
For example in document FR2686041, described a kind of for keeping and guide the fixture of material bands to be stretched.
Described fixture comprises:
-jig main body portion, it comprises inner lateral lip, and this inside lateral lip is fixed on upper lateral flange, and this upper lateral flange can be along the upper surface and two upper roll of rotating relative to lateral surface of the guide rail of band stretching-machine for supporting,
-being attached to the clamp base in jig main body portion, it is for supporting the lower rollers that can rotate along the lateral surface of guide rail,
-band clamping device, it forms two levers that are called clamp lever, and they can be against the inner side of fixture body, at an edge towards treating to keep in a side of expanded material band material bands.
In this known devices, inner lateral lip is complete and continuous, in order to avoid treat the impact of the lubricant that drawn polymer tapes is splashed.In reality, when fixture is during along rail moving, roller is with High Rotation Speed and lubricant is radially splashed.Along the inner side of fixture, treat expanded material strip side, described in splash and tackled by the inside lateral lip of jig main body portion.
In described document, jig main body portion has " U-shaped " horizontal section, and the outside lateral lip of this section relatively and be parallel to inner lateral lip.Described outside lateral lip is tackled any lubricant splashing toward the outer side by upper roll.Similarly, described clamp base comprises the outside lateral lip of tackling any lubricant splashing by lower rollers outwardly.
Therefore, the great majority of the lubricant being caused by roller radially splash and drop in clamp base, and at this clamp base place, they are collected.
A shortcoming is that the lubricant compatible with the high temperature of baking box becomes sticky especially and have the trend of gathering in the bottom of fixture body at lower temperature, thereby has hindered the operation of lower rollers.
Another shortcoming is that the clamp structure with U-shaped fixture body and U-shaped clamp base has relative high quality.Consider that film drawer comprises thousands of described fixtures, this causes way rub and the strong driving force of needs with movable clamp and film together, particularly at fixture when surpassing the speed fast moving of 500m/min.
Summary of the invention
An object of the present invention is both removals from the flow of lubricant of clamp base by improvement, by reduce the quality of fixture in the situation that not damaging its maintenance and guiding function, avoid again the shortcoming of known clamps.
Another object of the present invention is that this fixture is more easily assembled, and particularly makes it more easily to assemble the upper roll that can roll along the upper surface of track.
For realizing these objects and other objects, the present invention proposes a kind of for guiding and keep the maintenance fixture of material bands to be stretched, and described fixture comprises:
-jig main body portion (main clamp body), it comprises that private side is to (laterally) flange (alar part), this inside lateral lip is fixed on upper lateral flange, this upper lateral flange bearing upper roll, this upper roll can be relative with two along the upper surface of the guide rail of band stretching-machine lateral surface roll
-clamp base, it is attached in jig main body portion, and supports the lower rollers that can roll along the lateral surface of guide rail,
-band stretching device, it is arranged in this jig main body portion and can keeps against the inner side of fixture body an edge of material bands,
-this upper lateral flange is overall smooth, and there is no outside lateral lip, thereby in cross section, this jig main body portion has the global shape for inverted " L ".
The omission of outside lateral lip promotes the lubricant splashing towards the ejection of the outside of fixture, therefore reduces the speed that lubricant is collected in clamp base.From clamp base, remove lubricant subsequently therefore easier.
Meanwhile, omit the quality that outside lateral lip has reduced fixture significantly.
According to preferred embodiment, be also designed to:
-clamp base be overall smooth, be parallel to upper lateral flange directed, there is no outside lateral lip and be fixed on the free end of inner lateral lip,
-the assembly being formed by jig main body portion and clamp base assembling so the global shape with (accumbency) " U " lying down, and its outside towards fixture is completely open.
Omit outside lateral lip and also reduced towards the lubricant of clamp base and flow, and make it more easily from clamp base, to remove lubricant, thereby avoid interference the operation of lower rollers.
Preferably, clamp base can be included in the cavity that its upper surface is opened, and comprises the aperture for the passage of fat residue.
This allows directly to remove the lubricant that clamp base is collected.
More advantageously, described cavity can have smooth bottom or the downward-sloping bottom towards aperture.
This measure makes the removal of lubricant easier.In fact, noted, utilized known fixture, relative slope can cause hindering the lubricant of removing to gather.
In order to process the installation question of upper roll, can advantageously make described upper roll comprise ball bearing, this ball bearing has the inner ring being arranged on lateral shaft, and this lateral shaft is bonded in the sidewise hole of the holder in jig main body portion.
Preferably, this lateral shaft comprises:
-cascade ring, its shoulder is formed for the first end backstop of the lateral register of bearing inner race;
-screw, it has bar portion and head, and described bar portion is bonded in this cascade ring, and described head is formed for the second end backstop of the lateral register of bearing inner race.
Like this, first described cascade ring is arranged in the inner ring of ball bearing, and then described assembly is bonded in the holder of jig main body portion.Described screw then can be in the situation that do not introduced in this cascade ring with respect to the dangerous of bearing bias vertically.
According to a favourable embodiment, can be designed to:
The bar portion of-screw is smooth, and with little gap, engages in the sidewise hole of the free end of this bar portion and jig main body portion;
The head of-screw is threaded, and screws to the hole of the tapping of jig main body portion.
Described fixture is simple especially and cost is low, it can provide effective maintenance and the centering (centering) of bearing in jig main body portion.
Accompanying drawing explanation
By reference to the accompanying drawings, other objects of the present invention, Characteristics and advantages become obviously from the description of more following special embodiment, wherein:
Fig. 1 is the perspective view that keeps according to an embodiment of the invention fixture to look from top, outside;
Fig. 2 is the perspective view that the fixture of Fig. 1 is looked from outer side-lower;
Fig. 3 is the perspective view that the fixture of Fig. 1 is looked from inside front;
Fig. 4 is the end-view of the fixture of Fig. 1;
Fig. 5 is the perspective view that the jig main body portion of Fig. 1 looks from top, outside;
Fig. 6 is the perspective view that the jig main body portion of Fig. 1 looks from outer side-lower;
Fig. 7 is the perspective view that the clamp base of Fig. 1 is looked from top, and it is provided with lower rollers;
Fig. 8 is the perspective view that the clamp base of Fig. 7 is looked from top, and its central roll is removed; And
Fig. 9 be run through Fig. 1 jig main body portion and with the straight profile of upper roller shaft.
The specific embodiment
In embodiment as described in Figure, film stretching fixture 1 is intended to keep and guides treat expanded material band 2.This fixture 1 keeps treating the first edge 2a of expanded material band 2, and with other for keeping the fixture of same edge 2a combined, one group of other fixture staggered relatively keep treating the opposite edges of expanded material band 2 simultaneously, these other edges do not illustrate in the drawings.
For the mobile expanded material band 2 for the treatment of, fixture 1 moves and is driven into along track 3 translations by chain 4 along guide rail 3 (Fig. 4), the guiding of the driven device of this chain 4 own also drives in the mode of translation, and this drive unit is not shown and in film drawer, be traditional.
Towards treating the inner side 5 of expanded material band 2 orientations and being defined for fixture 1 away from the outside 6 for the treatment of expanded material band 2 orientations.
This fixture 1 comprises jig main body portion 7 and the clamp base 8 being bonded together.
Jig main body portion 7 comprises the inside lateral lip 7a being fixed on upper lateral flange 7b.
Inner lateral lip 7a totally smooth, perpendicular to treating the plane of expanded material band 2 and being parallel to, treat that the edge 2a of expanded material band is directed, and upper lateral flange 7b is overall smooth and flatly directed perpendicular to inner lateral lip 7a.Therefore, when observing end, as shown in Figure 4, jig main body portion 7 has the global shape of inverted " L ", and first branch of this " L " consists of vertical inside lateral lip 7a, and second branch of this " L " is formed by the upper lateral flange 7b of level.
Jig main body portion 7 supporting upper roll, as best illustrating in Fig. 2, described upper roll comprises that a pair of inner upper side direction deflector roll 9 and 10, pair of outer upper side are to deflector roll 11 and 12 and vertical deflector rolls 13 of central upper.These upper roll 9-13 can be relative with two along the upper surface of the guide rail 3 (Fig. 4) of band stretching-machine lateral surface roll.
The side direction deflector roll 9-12 on top each be mounted to can be around vertical axis revolving separately.Fig. 1 for example illustrates roller 11 axle 11a mounted thereto and roller 12 axle 12a mounted thereto.
Jig main body portion 7 also comprises band clamping device 14, and this band clamping device can keep treating along the inner side 5 of jig main body portion 7 an edge 2a of expanded material band 2.
In fact, band clamping device 14 comprises two pivot rotaring lever 14a and 14b, and they are called clamp lever, are mounted to around longitudinal axis 14c pivotable and comprise control arm 14d or 14e separately and comprise clamp arm 14f or 14g (Fig. 3) separately.Described clamp arm 14f and 14g are configured as and press horizontal stand 14h (Fig. 4).Therefore, as shown in Figure 4, the edge 2a that treats expanded material band 2 is clamped in clamp arm for example between arm 14f and support 14h.For example helical spring 14i and 14j (Fig. 1) are reset to clamped position as shown in Figure 4 by elastic device to clamp 14a or 14b.In clamped position as shown in Figure 4, it is upper that clamp arm 14f is supported on support 14h with the position tilting toward the outer side, thereby by treating that any tension force that expanded material band 2 applies is tending towards making to clamp 14a along the direction pivotable clamping more tightly.
The vertical deflector roll 13 of central upper is arranged in holder 13a (Fig. 2,6 and 9), and remains in this holder by lateral shaft 13b (Fig. 1 and 9).
As found out in detail from Fig. 9, the vertical deflector roll 13 of central upper comprises ball bearing, and this ball bearing has the inner ring 13h being arranged on lateral shaft 13b, and described lateral shaft 13b itself is bonded in the sidewise hole 13c and 13d of holder 13a.
At the assembling position shown in Fig. 9, the shoulder of cascade ring 13e is formed for the first end backstop of the lateral register of bearing inner race 13h, and the vertical deflector roll 13 of its opposing central upper portion is towards the movement of the inner side 5 of fixture 1.Equally, the head 13g of screw 13f is formed for the second end backstop of the lateral register of bearing inner race 13h, and the vertical deflector roll 13 of its opposing central upper portion is towards the movement in the outside 6 of fixture 1.
Top central vertical deflector roll 13 is installed, cascade ring 13e is bonded in the inner ring 13h of roller 13, then the assembly forming is thus bonded in holder 13a, then whole required exactly screw 13f being inserted in cascade ring 13e so that they are all bonded together.
As shown in Fig. 1-4,7 and 8, the lower rollers that clamp base 8 supportings can be rotated on the lateral face of guide rail 3 (Fig. 4).These lower rollers comprise a pair of inner lower side direction deflector roll 15 and 16 and pair of outer lower side to deflector roll 17 and 18, all these deflector rolls are arranged on vertical axis separately, for example the axle 18a of roller 18 or the axle 17a of roller 17.
Meanwhile, means of vertical screws 19 provides and being connected of the chain link of chain 4, so that chain 4 is connected on fixture 1.
As shown in FIG., therefore the assembly being formed by the jig main body portion 7 of assembling and clamp base 8 has the global shape of " U " shape of lying down, and its whole openings point to the outside 6 of fixture 1.In other words, along the outside 6 of fixture 1, this U-shaped profile is wide-open, does not cover the outside lateral lip of roller 11,12,17 and 18.
Referring to Fig. 8, clamp base 8 comprises cavity 8a, 8b, 8c, 8d and the 8e of upper surface open more especially, and for the passage aperture 8f to lower channel, 8g, 8h, the 8i (Fig. 2) of fat residue.The side of passage 8f-8i is connected to lower annular lip shape portion, and described lower annular lip shape portion contributes to fat residue to drip to prevent that it from gathering.
Referring to accompanying drawing, Fig. 7 especially, lower rollers 15-18 does not insert in cavity 8a, 8b and 8c, but is arranged on these cavitys and is positioned at the plane on the edge of cavity 8a, 8b and 8c.
Therefore, by the rotation of lower rollers 15-18, throwing any fat residue out all can depart from towards the outside 6 of fixture 1 and not fall in clamp base 8.
Similarly, upper roll 9-12 is positioned at the below of upper lateral flange 7b, and any fat residue of throwing away of the rotation by upper roll 9-12 all can depart from along the outside 6 of fixture 1 and do not fall into clamp base 8.Then this has reduced gathering of fat residue in clamp base 8.
The present invention is not limited to the embodiment clearly describing, but comprises various alternative forms and the summary in the scope that drops on following claim.
Claims (7)
1. for guiding and keep treating the maintenance fixture (1) of expanded material band (2), described fixture comprises:
-jig main body portion (7), this jig main body portion comprises the inside lateral lip (7a) being fixed on upper lateral flange (7b), this upper lateral flange bearing can be relative with two along the upper surface of the guide rail (3) of band stretching-machine the lateral surface upper roll (9-13) of rolling
-be attached to the clamp base (8) in this jig main body portion (7), the lower rollers (15-18) that this clamp base supporting can be rolled along the lateral surface of guide rail (3),
-band clamping device (14), this band clamping device is arranged on described jig main body portion (7) above and can keeps against the inner side (5) of this fixture (1) edge of this material bands (2),
It is characterized in that:
-described upper lateral flange (7b) is overall smooth and there is no outside lateral lip, thereby this jig main body portion (7) has the global shape of inverted " L " in cross section.
2. fixture as claimed in claim 1 (1), is characterized in that:
-described clamp base (8) is free end overall smooth, that be parallel to this upper lateral flange (7b) orientation, there is no outside lateral lip and be fixed on described inner lateral lip (7a),
-the assembly being formed by described jig main body portion (7) and clamp base (8) assembling so the global shape with " U " that lie down, its complete openings points to the outside (6) of fixture (1).
3. fixture as claimed in claim 1 or 2 (1), it is characterized in that, described clamp base (8) comprises the cavity (8a, 8b, 8c, 8d, 8e) of upper surface open, and comprises the aperture (8f-8i) for the passage of fat residue.
4. fixture as claimed in claim 3 (1), is characterized in that, described cavity (8a, 8b, 8c, 8d, 8e) there is smooth bottom or towards aperture (8f-8i) downward-sloping.
5. the fixture (1) as described in one of claim 1-4, it is characterized in that, described upper roll (13) comprises ball bearing, this ball bearing has the inner ring (13h) being arranged on lateral shaft (13b), and this lateral shaft is bonded in the sidewise hole (13c, 13d) of holder (13a) in jig main body portion (7).
6. fixture as claimed in claim 5 (1), is characterized in that, described lateral shaft (13b) comprising:
-cascade ring (13e), the shoulder of this cascade ring is formed for the first end backstop of the lateral register of this bearing inner race (13h);
-screw (13f), this screw has bar portion (13b) and head (13g), this bar portion (13b) is bonded in this cascade ring (13e), and this head (13g) is formed for the second end backstop of the lateral register of this bearing inner race (13h).
7. fixture as claimed in claim 6 (1), is characterized in that:
The bar portion (13b) of-described screw (13f) is smooth, and the free end of this bar portion engages with little gap with the sidewise hole (13c) of jig main body portion (7);
The head (13g) of-described screw (13f) is threaded and screws to the hole (13d) of the tapping of this jig main body portion (7).
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/FR2011/051324 WO2012168566A1 (en) | 2011-06-10 | 2011-06-10 | Clip for stretching a film |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103687714A true CN103687714A (en) | 2014-03-26 |
Family
ID=44629772
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201180071534.8A Pending CN103687714A (en) | 2011-06-10 | 2011-06-10 | Clip for stretching a film |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP2718091A1 (en) |
| CN (1) | CN103687714A (en) |
| WO (1) | WO2012168566A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109318469A (en) * | 2017-08-01 | 2019-02-12 | 布鲁克纳机械有限责任两合公司 | Stretcher |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2803473B1 (en) * | 2013-05-16 | 2016-04-13 | Andritz AG | Dual tenter clip and table assembly and transverse sheet stretching plants comprising same |
| DE102013017011A1 (en) | 2013-10-14 | 2015-04-30 | Brückner Maschinenbau GmbH & Co. KG | Clips transporting unit |
| DE102019127701A1 (en) * | 2019-10-15 | 2021-04-15 | Brückner Maschinenbau GmbH & Co. KG | Clip carriage for a transport chain arrangement of a stretching system and an associated stretching system |
| CN117644644B (en) * | 2024-01-30 | 2024-04-05 | 合肥东昇智能装备股份有限公司 | Double-zipper clamp |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0862985A2 (en) * | 1997-03-03 | 1998-09-09 | Lindauer Dornier Gesellschaft M.B.H | Guide rail for tentering clips in a stenter device, especially for film stretching |
| CN1217976A (en) * | 1997-09-11 | 1999-06-02 | 株式会社日立制作所 | Simultaneous biaxial strtching apparatus and method |
| CN1440868A (en) * | 2002-01-16 | 2003-09-10 | 富士胶片株式会社 | Tenter device |
| CN1486836A (en) * | 2003-08-12 | 2004-04-07 | 中国科学院长春应用化学研究所 | Bidirectional mechanical film stretcher |
| CN102015253A (en) * | 2008-04-30 | 2011-04-13 | 林道尔.多尼尔有限责任公司 | Apparatus for stretching film webs transversely |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61295955A (en) * | 1985-06-25 | 1986-12-26 | Mitsubishi Heavy Ind Ltd | Stretching machine |
| FR2686041B1 (en) | 1992-01-13 | 1996-07-19 | Darlet Marchante Tech Sa | CROSS-DRAWING DEVICE FOR THE MANUFACTURE OF BIORIENT FILMS. |
| JP3942250B2 (en) * | 1997-12-10 | 2007-07-11 | 東芝機械株式会社 | Film transverse stretching machine |
-
2011
- 2011-06-10 CN CN201180071534.8A patent/CN103687714A/en active Pending
- 2011-06-10 WO PCT/FR2011/051324 patent/WO2012168566A1/en active Application Filing
- 2011-06-10 EP EP11740958.1A patent/EP2718091A1/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0862985A2 (en) * | 1997-03-03 | 1998-09-09 | Lindauer Dornier Gesellschaft M.B.H | Guide rail for tentering clips in a stenter device, especially for film stretching |
| CN1217976A (en) * | 1997-09-11 | 1999-06-02 | 株式会社日立制作所 | Simultaneous biaxial strtching apparatus and method |
| CN1440868A (en) * | 2002-01-16 | 2003-09-10 | 富士胶片株式会社 | Tenter device |
| CN1486836A (en) * | 2003-08-12 | 2004-04-07 | 中国科学院长春应用化学研究所 | Bidirectional mechanical film stretcher |
| CN102015253A (en) * | 2008-04-30 | 2011-04-13 | 林道尔.多尼尔有限责任公司 | Apparatus for stretching film webs transversely |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109318469A (en) * | 2017-08-01 | 2019-02-12 | 布鲁克纳机械有限责任两合公司 | Stretcher |
| CN109318469B (en) * | 2017-08-01 | 2020-11-17 | 布鲁克纳机械有限责任两合公司 | Stretching apparatus |
| US11167468B2 (en) | 2017-08-01 | 2021-11-09 | Brückner Maschinenbau GmbH & Co. KG | Stretching system |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2718091A1 (en) | 2014-04-16 |
| WO2012168566A1 (en) | 2012-12-13 |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140326 |