EP1820891B1 - Method of making a warp knitting element carrying bar of synthetic material and bar of synthetic material for warp knitting elements - Google Patents
Method of making a warp knitting element carrying bar of synthetic material and bar of synthetic material for warp knitting elements Download PDFInfo
- Publication number
- EP1820891B1 EP1820891B1 EP20060024253 EP06024253A EP1820891B1 EP 1820891 B1 EP1820891 B1 EP 1820891B1 EP 20060024253 EP20060024253 EP 20060024253 EP 06024253 A EP06024253 A EP 06024253A EP 1820891 B1 EP1820891 B1 EP 1820891B1
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- EP
- European Patent Office
- Prior art keywords
- plastic
- hose
- bar
- wall
- finished product
- 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.)
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Links
- 238000009940 knitting Methods 0.000 title claims description 20
- 238000004519 manufacturing process Methods 0.000 title claims description 8
- 229920002994 synthetic fiber Polymers 0.000 title 2
- 239000004033 plastic Substances 0.000 claims description 80
- 229920003023 plastic Polymers 0.000 claims description 80
- 239000011265 semifinished product Substances 0.000 claims description 49
- 238000000034 method Methods 0.000 claims description 15
- 239000012530 fluid Substances 0.000 claims description 7
- 238000003825 pressing Methods 0.000 claims description 6
- 229920000139 polyethylene terephthalate Polymers 0.000 claims description 5
- 239000005020 polyethylene terephthalate Substances 0.000 claims description 5
- 238000013022 venting Methods 0.000 claims description 3
- 230000002787 reinforcement Effects 0.000 description 4
- 239000000835 fiber Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- -1 polyethylene terephthalate Polymers 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229920002430 Fibre-reinforced plastic Polymers 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000011151 fibre-reinforced plastic Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 235000013372 meat Nutrition 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000002990 reinforced plastic Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000012783 reinforcing fiber Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 235000013580 sausages Nutrition 0.000 description 1
Images
Classifications
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04B—KNITTING
- D04B27/00—Details of, or auxiliary devices incorporated in, warp knitting machines, restricted to machines of this kind
- D04B27/06—Needle bars; Sinker bars
Definitions
- the invention relates to a method for producing a plastic Wirktechnikmaschinebarre having a first portion in which a wall surrounds an interior, and a second portion, are arranged in the edge portions of the wall above the other, in which a flat plastic semi-finished in insert a press mold and pressurized to press the second section. Furthermore, the invention relates to a plastic Wirktechnikmaschinebarre with a first portion in which a wall surrounds an interior, and a second portion in which the wall continues with two edge portions and in which the edge portions are arranged one above the other.
- Knitting machines usually have several bars that carry knitting tools.
- elements of action are all elements that are combined on the Knitting process are involved, such as knitting needles, hole needles, milling plates, Polplatinen, tee boards, etc.
- a bar carries guide needles, then it must be swung once and once to form a loop in a knitting cycle in the direction of the longitudinal extent of the knitting machine. Under certain circumstances, a pivoting is added transversely to the L Lucasserstrekkung the knitting machine. Other bars are only moved transversely to the longitudinal extent of the knitting machine or in other directions. In all cases, you must accelerate the bar from standstill and decelerate to reach the final position of the bar in a cycle again. The larger the mass of the barre, the larger the forces required to accelerate and decelerate the bar.
- Knitting machines can have widths that extend over several meters, for example, over 6 m. In order to be able to work satisfactorily, the bar needs a certain mechanical stability. This also applies to shorter lengths. In particular, the bar should have some rigidity and not swing. On the other hand, you want to keep the mass of the bar as low as possible in order to operate the knitting machine at high speeds.
- DE 41 11 108 C2 proposed to form a bar of a reinforced plastic by forming the hollow profile of flat overlapping superimposed bands of plastic.
- a shaped body is arranged, which remains permanently in the cavity and contains nut thread pieces for the attachment of components.
- the shaped body is required so that you have an abutment during manufacture of the bar, against which the fiber-reinforced plastic bands can be placed.
- the molded body is used for fastening nut thread pieces, which later components can be attached.
- the DE 203 14 470 U1 shows a similar design of the Wirkwerkmaschinemaschinen.
- the invention has for its object to make the production of a plastic Wirktechnikmaschinebarre simple and flexible.
- This object is achieved in a method of the type mentioned in that one acts on the interior during pressing by means of a pressurized fluid with internal pressure.
- the internal pressure which can be generated by a pressurized fluid, for example compressed air or a liquid, takes over the task of the hollow body, i. the internal pressure presses the plastic, which forms the wall surrounding the interior, from the inside to the outside against the press mold.
- a pressurized fluid for example compressed air or a liquid
- a prepreg Preferably used as a plastic semi-finished product is a prepreg, in particular a UD prepreg.
- a prepreg is a plastic semi-finished product in a flat form, in which reinforcing fibers are embedded in a plastic matrix.
- a UD prepreg UD stands for unidirectional
- the fibers all have the same preferred direction.
- Such a prepreg is cured in the press mold under pressure and optionally also at elevated temperature and / or with heat release. This gives a bar with a relatively high strength.
- the hose is only put under pressure when the mold is closed. Before that, it can be easily filled, if appropriate.
- the hose has two tasks. First, he holds when inserting the plastic, the inner walls, ie, the inside of the wall surrounding the cavity away from each other, so that the inner walls do not stick together.
- the tube is pressurized to press the plastic semi-finished product from the inside outwards against the press mold. Only the hose must therefore be able to hold the pressure building fluid.
- This fluid may be a gas, for example air, or a liquid, for example water.
- the bar itself does not have to be gas or liquid tight. Also, one need not worry that the plastic material is compatible with the fluid. In addition, it is easier to create a pressure chamber with the help of the hose than simply to produce such a pressure chamber only in the press mold.
- the tube is left in the interior and receives a knitting tool bar according to claim 11.
- the hose will stick to the plastic during pressing. It is much easier to leave the hose in the interior than to remove it. An appreciable increase in mass is not associated with leaving the hose in the interior.
- a hose made of a temperature-resistant plastic, in particular polyethylene terephthalate.
- the curing of the plastic semifinished product usually takes place at an elevated temperature. It is therefore advantageous if the tube can withstand this temperature so that the desired pressure can be maintained throughout the curing process inside the tube.
- a hose is used with a wall thickness of not more than 0.5 mm, in particular not more than 0.05 mm.
- a preferred embodiment of the method uses a hose whose wall thickness is 0.025 mm.
- Such hoses are commercially available, for example for the production of sausages in a meat processing plant.
- the hose does not even have to be stretchable. It is easy to use a tube whose cross-section in the fully inflated state is greater than the cross-section of the interior. If the hose strikes when inflating, this is not critical. All that is necessary is that you can apply a predetermined pressure with the help of the hose.
- auxiliary element is inserted, which is arranged between a press cavity and a vent channel.
- the auxiliary element has two advantages. On the one hand, it allows venting, in particular in the case of sharp corners or edges of the mold, because the auxiliary element can never rest in a completely gastight manner on other components of the mold. On the other hand, you can make certain minor changes with the help of the auxiliary element also on the Au- ⁇ enkontur. For this it is only necessary to replace the auxiliary element. The press mold can otherwise remain unchanged.
- a plurality of layers of the plastic semifinished product are arranged one above the other.
- certain areas of the wall can be selectively strengthened, if desired or required.
- a reinforcement can be useful, for example, if fastening elements are to be arranged in this partial area of the wall.
- At least one further layer of semi-finished plastic material is used in the second section.
- the second section is often used to hold knitting elements, such as guide needles or the like. Again, then a reinforcement may be useful.
- the object is achieved in a plastic Wirktechnikmaschinebarre of the type mentioned fact that on the inside of the wall, a hose is arranged.
- the tube can be used in the production of the bar to build a pressure in the interior, which presses the plastic semi-finished product from the inside out against the press mold.
- the tube sticks to the plastic semifinished product when the plastic semifinished product cures.
- the tube then remains in the bar. But he does not wear anything worth mentioning to a mass increase, so that he does not bother.
- the tube is formed of a temperature-resistant plastic, in particular polyethylene terephthalate.
- the tube thus keeps out the temperatures that arise during curing of the plastic semifinished product.
- the pressure generated in the interior of the tube during manufacture of the bar can be maintained until a time at which the plastic has cured.
- the tube has a wall thickness of not more than 0.5 mm, in particular not more than 0.05 mm. In a preferred embodiment, the tube has a wall thickness of 0.025 mm.
- the hose itself does not have to have greater mechanical strength. He puts himself in creating the pressure from the inside of the plastic semi-finished, which in turn is supported on the press mold. Accordingly, even with very thin wall thicknesses there is virtually no danger that the hose will be damaged by the generation of pressure.
- a plurality of layers of a plastic semifinished product are arranged one above the other. You can selectively reinforce the wall in these areas to accommodate, for example, fasteners there.
- At least one further layer of the plastic semifinished product is arranged in the second section. Leave it strengthen the second section so that it can be used for the attachment of active elements.
- Fig. 1 shows a first half 1 of a press mold 2 ( Fig. 3 ) for producing a Barre 3 ( Fig. 4 ).
- the first half 1 has a press cavity 4, in which an auxiliary element 5 is arranged.
- the auxiliary element 5 forms with the first half 1 of the press mold a gap 6, which leads from the press cavity 4 to a vent channel 7.
- the press mold 2 also has a second half 8, which also has a press cavity 9.
- the individual layers are expediently oriented in different directions, so that, for example, adjacent layers at an angle of 90 ° (other angles are possible) include. It comes an edge portion 11 of the plastic semifinished product 10 to lie on the auxiliary element 5.
- the plastic semifinished product 10 then lines the press cavity 4, in the present case, V-shaped.
- a tube 12 is inserted, which for reasons of clarity in Fig. 1 already shown with a certain filling. In fact, the hose does not yet have to be inflated. Then it will, like this Fig.
- the clear distance between the two press halves 1, 8 is slightly smaller than twice the thickness of the plastic semifinished product 10 in the non-compressed state, so that by closing the press mold 2, a pressure on the two Can exert edge portions 11, 13.
- the two edge portions 11, 13 of the plastic semifinished product are pressed together in this way. They form a second section b of the barre ( Fig. 4 ). At this second section knitting tools can be attached later.
- the tube 12 is pressurized by a pressurized fluid under pressure, such as compressed air, water or oil, fed into the tube 12 and then presses the remaining area of the plastic semifinished product 10 against the press mold 2 from the inside, so that a first section a is formed, in which a wall 17 surrounds an interior 18 ( Fig. 4 ).
- a shaped body which serves as an abutment, is not required here.
- the tube 12 is formed of a plastic that can withstand the temperatures occurring during curing of the plastic semifinished product 10 without being damaged.
- a suitable material for this is, for example, polyethylene terephthalate.
- the hose itself does not require greater mechanical stability. Accordingly, a wall thickness of, for example, 0.025 mm is sufficient.
- Fig. 5 to 7 show a modified embodiment in which the same parts are provided with the same reference numerals.
- the auxiliary element 5 has been omitted here in the first half of the press mold 1. While in the embodiment of the Fig. 1 to 4 Inserting a single plastic semi-finished product 10 in the press mold 2, one uses in the embodiment of the Fig. 5 to 7 two separate plastic semi-finished products 10a, 10b, which are inserted with formation of an overlap zone 10c in the first half 1 of the press mold 2. Then, if you put the tube 12 under pressure, then there is a reinforced zone 17a of the wall 17, where you can attach, for example, holding elements for the bar.
- Fig. 8 shows a modified form of the bar 3 with a fastener 19 in a reinforced portion 17 a. Furthermore, the second area b of the bar 3 is reinforced in order to be able to better attach knitting needles to it, for example.
- Fig. 9 shows how to prepare plastic semi-finished products for insertion into the press mold 2 and the individual plastic semi-finished products 20a, 20b, 20c, 20d in the press mold 2 inserts.
- the plastic semi-finished products 20a-20d are then pressed in the first area a by means of the pressurization of the hose 12 against the inner wall of the press mold 2.
- the plastic semi-finished products 20a-20c are pressed together by squeezing the two halves 1, 8 together.
- the plastic semi-finished product 20a is placed in the form of an ⁇ -shaped loop around the tube 12, so that its edge portions 11, 13 are superimposed. These two edge portions 11, 13 are separated from each other by the two other plastic semi-finished products 20b, 20c. This results in four layers, which through the Pressurization of the two halves 1, 8 of the press mold 2 are pressed together.
- the plastic semi-finished product 20d is arranged, which is pressed with the lower wall 17b of the wall 17 by the pressurization of the tube 12.
- Fig. 10 shows a schematic representation of how a plurality of UD prepregs 21a-21e are arranged one above the other. Shown are only the fibers of the prepregs 21a-21e. A plastic matrix present in the prepregs is not apparent here. Such a stack of prepregs provides excellent stability in virtually all directions when used as a plastic semi-finished product.
- anyone in Fig. 10 "Wires" actually consists of many hundreds or many thousands of individual fibers.
- the thickness of the bar By choosing several or less superimposed prepreg layers, the thickness of the bar, more precisely, the thickness of the wall thickness change. This makes it easy to create reinforced areas.
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Moulding By Coating Moulds (AREA)
Description
Die Erfindung betrifft ein Verfahren zum Herstellen einer Kunststoff-Wirkwerkzeugbarre, die einen ersten Abschnitt, in dem eine Wand einen Innenraum umgibt, und einen zweiten Abschnitt, in dem Randabschnitte der Wand übereinander angeordnet sind, aufweist, bei dem man ein flächiges Kunststoff-Halbzeug in eine Pressenform einlegt und zum Pressen des zweiten Abschnitts mit Druck beaufschlagt. Ferner betrifft die Erfindung eine Kunststoff-Wirkwerkzeugbarre mit einem ersten Abschnitt, in dem eine Wand einen Innenraum umgibt, und einem zweiten Abschnitt, in dem sich die Wand mit zwei Randabschnitten fortsetzt und in dem die Randabschnitte übereinander angeordnet sind.The invention relates to a method for producing a plastic Wirkwerkzeugbarre having a first portion in which a wall surrounds an interior, and a second portion, are arranged in the edge portions of the wall above the other, in which a flat plastic semi-finished in insert a press mold and pressurized to press the second section. Furthermore, the invention relates to a plastic Wirkwerkzeugbarre with a first portion in which a wall surrounds an interior, and a second portion in which the wall continues with two edge portions and in which the edge portions are arranged one above the other.
Wirkmaschinen haben in der Regel mehrere Barren, die Wirkwerkzeuge tragen. Unter "Wirkwerkzeugen" werden der Einfachheit halber alle Elemente zusammengefaßt, die am Wirkvorgang beteiligt sind, beispielsweise Wirknadeln, Lochnadeln, Fräsbleche, Polplatinen, Abschlagplatinen, etc.Knitting machines usually have several bars that carry knitting tools. For the sake of simplicity, "elements of action" are all elements that are combined on the Knitting process are involved, such as knitting needles, hole needles, milling plates, Polplatinen, tee boards, etc.
Wenn eine Barre beispielsweise Legenadeln trägt, dann muß sie zur Maschenbildung in einem Maschenbildungszyklus in Richtung der Längserstreckung der Wirkmaschine einmal hin und einmal her verschwenkt werden. Unter Umständen kommt eine Verschwenkung quer zur Längserstrekkung der Wirkmaschine hinzu. Andere Barren werden nur quer zur Längserstreckung der Wirkmaschine bewegt oder in andere Richtungen. In allen Fällen muß man die Barre aus dem Stillstand beschleunigen und zum Erreichen der Endposition der Barre in einem Zyklus wieder abbremsen. Je größer die Masse der Barre ist, desto größer sind die zum Beschleunigen und Abbremsen der Barre erforderlichen Kräfte.For example, if a bar carries guide needles, then it must be swung once and once to form a loop in a knitting cycle in the direction of the longitudinal extent of the knitting machine. Under certain circumstances, a pivoting is added transversely to the Längserstrekkung the knitting machine. Other bars are only moved transversely to the longitudinal extent of the knitting machine or in other directions. In all cases, you must accelerate the bar from standstill and decelerate to reach the final position of the bar in a cycle again. The larger the mass of the barre, the larger the forces required to accelerate and decelerate the bar.
Wirkmaschinen können Breiten aufweisen, die sich über mehrere Meter erstrecken, beispielsweise über 6 m. Um zufriedenstellend arbeiten zu können, benötigt die Barre eine gewisse mechanische Stabilität. Dies gilt im übrigen auch bei kürzeren Längen. Insbesondere sollte die Barre eine gewisse Steifigkeit aufweisen und nicht schwingen. Andererseits möchte man die Masse der Barre möglichst gering halten, um die Wirkmaschine mit hohen Arbeitsgeschwindigkeiten betreiben zu können.Knitting machines can have widths that extend over several meters, for example, over 6 m. In order to be able to work satisfactorily, the bar needs a certain mechanical stability. This also applies to shorter lengths. In particular, the bar should have some rigidity and not swing. On the other hand, you want to keep the mass of the bar as low as possible in order to operate the knitting machine at high speeds.
Man hat lange Zeit die Barren einer Wirkmaschine aus einem Leichtmetall, beispielsweise Magnesium oder Aluminium, gefertigt. Eine daraus hergestellte Barre hat aber immer noch eine beträchtliche Masse.It has long been the bars of a knitting machine made of a light metal, such as magnesium or aluminum. But a Barre made from it still has a considerable mass.
Man hat daher in
Eine derartige Ausbildung hat jedoch den Nachteil, daß mit dem Formkörper eine zusätzliche Masse in die Barre eingebracht wird.However, such a design has the disadvantage that an additional mass is introduced into the bar with the molded body.
Aus
Der Erfindung liegt die Aufgabe zugrunde, das Herstellen einer Kunststoff-Wirkwerkzeugbarre einfach und flexibel zu gestalten.The invention has for its object to make the production of a plastic Wirkwerkzeugbarre simple and flexible.
Diese Aufgabe wird bei einem Verfahren der eingangs genannten Art dadurch gelöst, daß man den Innenraum beim Pressen mittels eines Druckfluids mit Innendruck beaufschlagt.This object is achieved in a method of the type mentioned in that one acts on the interior during pressing by means of a pressurized fluid with internal pressure.
Bei dieser Ausgestaltung kann man eine Pressenform verwenden, die lediglich die äußere Form der Barre definiert. Im Innern des Innenraums ist man jedoch frei. Hier kann man ohne Änderungen einer Pressenform Veränderungen vornehmen, beispielsweise Verstärkungen unterbringen oder dergleichen. Beim Pressen übernimmt der Innendruck, der durch ein' Druckfluid, beispielsweise Druckluft oder eine Flüssigkeit, erzeugt werden kann, die Aufgabe des Hohlkörpers, d.h. der Innendruck preßt den Kunststoff, der die den Innenraum umgebende Wand bildet, von innen nach außen gegen die Pressenform. In Abhängigkeit von der Höhe des im Innenraum herrschenden Innendrucks beim Pressen lassen sich hier ausreichend große Festigkeiten erzielen. Dadurch, daß man den Innenraum als Hohlraum gestalten kann, ist es nicht notwendig, eine zusätzliche Masse in die Barre einzutragen, so daß man bei einer hohen Stabilität eine Masse mit vergleichsweise geringem Gewicht erhält.In this embodiment, one can use a press mold which defines only the outer shape of the bar. Inside the interior, however, one is free. Here you can make changes without changing a press form, for example, accommodate reinforcements or the like. During pressing, the internal pressure, which can be generated by a pressurized fluid, for example compressed air or a liquid, takes over the task of the hollow body, i. the internal pressure presses the plastic, which forms the wall surrounding the interior, from the inside to the outside against the press mold. Depending on the height of the internal pressure prevailing in the interior during pressing, sufficiently high strengths can be achieved here. The fact that you can make the interior as a cavity, it is not necessary to enter an additional mass in the bar so that you get a mass with comparatively low weight with a high stability.
Vorzugsweise verwendet man als Kunststoff-Halbzeug ein Prepreg, insbesondere ein UD-Prepreg. Ein Prepreg ist ein Kunststoff-Halbzeug in flächiger Form, bei dem in eine Kunststoffmatrix Verstärkungsfasern eingebettet sind. Bei einem UD-Prepreg (UD steht für unidirektional) haben die Fasern alle die gleiche Vorzugsrichtung. Ein derartiges Prepreg wird in der Pressenform unter Druck und gegebenenfalls auch unter erhöhter Temperatur und/oder unter Wärmeabgabe zum Aushärten gebracht. Man erhält dadurch eine Barre mit einer relativ großen Festigkeit.Preferably used as a plastic semi-finished product is a prepreg, in particular a UD prepreg. A prepreg is a plastic semi-finished product in a flat form, in which reinforcing fibers are embedded in a plastic matrix. In a UD prepreg (UD stands for unidirectional), the fibers all have the same preferred direction. Such a prepreg is cured in the press mold under pressure and optionally also at elevated temperature and / or with heat release. This gives a bar with a relatively high strength.
Hierbei ist bevorzugt, daß man einen Schlauch mit dem Kunststoff-Halbzeug in die Pressenform einlegt und das Kunststoff-Halbzeug um den Schlauch herum führt, wobei man den Schlauch unter Druck setzt. Der Schlauch wird allerdings erst dann unter Druck gesetzt, wenn die Pressenform geschlossen ist. Vorher kann er leicht gefüllt sein, wenn dies zweckmäßig ist. Der Schlauch hat dabei zwei Aufgaben. Zum einen hält er beim Einlegen des Kunststoffs die Innenwände, d.h. die Innenseite der den Hohlraum umgebenden Wand, voneinander weg, so daß die Innenwände nicht miteinander verkleben. Zum anderen wird der Schlauch unter Druck gesetzt, um das Kunststoff-Halbzeug von innen nach außen gegen die Pressenform zu pressen. Lediglich der Schlauch muß also in der Lage sein, das den Druck aufbauende Fluid zu halten. Dieses Fluid kann dabei ein Gas, beispielsweise Luft, oder eine Flüssigkeit, beispielsweise Wasser, sein. Die Barre selbst muß dann nicht gas- oder flüssigkeitsdicht sein. Auch muß man keine Sorge dafür tragen, daß das Kunststoffmaterial mit dem Fluid verträglich ist. Darüber hinaus ist es einfacher, mit Hilfe des Schlauchs einen Druckraum zu schaffen als einen derartigen Druckraum einfach nur in der Pressenform zu erzeugen.It is preferred that one inserts a tube with the plastic semi-finished in the press mold and the Plastic semi-finished leads around the hose around, where you put the hose under pressure. However, the hose is only put under pressure when the mold is closed. Before that, it can be easily filled, if appropriate. The hose has two tasks. First, he holds when inserting the plastic, the inner walls, ie, the inside of the wall surrounding the cavity away from each other, so that the inner walls do not stick together. On the other hand, the tube is pressurized to press the plastic semi-finished product from the inside outwards against the press mold. Only the hose must therefore be able to hold the pressure building fluid. This fluid may be a gas, for example air, or a liquid, for example water. The bar itself does not have to be gas or liquid tight. Also, one need not worry that the plastic material is compatible with the fluid. In addition, it is easier to create a pressure chamber with the help of the hose than simply to produce such a pressure chamber only in the press mold.
Vorzugsweise beläßt man den Schlauch im Innenraum und erhält eine Wirkwerkzeugbarre gemäß Anspruch 11. Bei vielen Kunststoffen wird der Schlauch beim Pressen mit dem Kunststoff verkleben. Es ist wesentlich einfacher, den Schlauch im Innenraum zu belassen als ihn zu entfernen. Eine nennenswerte Massenvergrößerung ist mit dem Belassen des Schlauchs im Innenraum nicht verbunden.Preferably, the tube is left in the interior and receives a knitting tool bar according to
Vorzugsweise verwendet man einen Schlauch aus einem temperaturbeständigen Kunststoff, insbesondere Polyethylenterephthalat. Das Aushärten des Kunststoff-Halbzeugs erfolgt in der Regel unter einer erhöhten Temperatur. Es ist daher von Vorteil, wenn der Schlauch diese Temperatur aushält, so daß während des gesamten Vorgangs des Aushärtens im Innern des Schlauchs der gewünschte Druck aufrecht erhalten werden kann.Preferably, a hose made of a temperature-resistant plastic, in particular polyethylene terephthalate. The curing of the plastic semifinished product usually takes place at an elevated temperature. It is therefore advantageous if the tube can withstand this temperature so that the desired pressure can be maintained throughout the curing process inside the tube.
Vorzugsweise verwendet man einen Schlauch mit einer Wandstärke von maximal 0,5 mm, insbesondere maximal 0,05 mm. Eine bevorzugte Ausgestaltung des Verfahrens verwendet einen Schlauch, dessen Wandstärke 0,025 mm beträgt. Derartige Schläuche sind im Handel erhältlich, beispielsweise für die Produktion von Würsten in einem fleischverarbeitenden Betrieb. Der Schlauch muß nicht einmal dehnbar sein. Man kann ohne weiteres einen Schlauch verwenden, dessen Querschnitt im vollständig aufgeblasenen Zustand größer ist als der Querschnitt des Innenraums. Wenn der Schlauch beim Aufblasen Falten schlägt, ist dies unkritisch. Notwendig ist lediglich, daß man mit Hilfe des Schlauchs einen vorbestimmten Druck aufbringen kann.Preferably, a hose is used with a wall thickness of not more than 0.5 mm, in particular not more than 0.05 mm. A preferred embodiment of the method uses a hose whose wall thickness is 0.025 mm. Such hoses are commercially available, for example for the production of sausages in a meat processing plant. The hose does not even have to be stretchable. It is easy to use a tube whose cross-section in the fully inflated state is greater than the cross-section of the interior. If the hose strikes when inflating, this is not critical. All that is necessary is that you can apply a predetermined pressure with the help of the hose.
Auch ist bevorzugt, daß man eine Pressenform verwendet, in die ein Hilfselement eingelegt ist, das zwischen einem Pressenhohlraum und einem Entlüftungskanal angeordnet ist. Das Hilfselement hat dabei zwei Vorteile. Zum einen erlaubt es insbesondere bei scharfen Ecken oder Kanten der Form eine Entlüftung, weil das Hilfselement an übrigen Bestandteilen der Form nie ganz gasdicht anliegen kann. Zum anderen kann man mit Hilfe des Hilfselements bestimmte kleinere Änderungen auch an der Au-βenkontur vornehmen. Hierzu ist es lediglich erforderlich, das Hilfselement auszutauschen. Die Pressenform kann im übrigen unverändert verbleiben.It is also preferred that one uses a press mold, in which an auxiliary element is inserted, which is arranged between a press cavity and a vent channel. The auxiliary element has two advantages. On the one hand, it allows venting, in particular in the case of sharp corners or edges of the mold, because the auxiliary element can never rest in a completely gastight manner on other components of the mold. On the other hand, you can make certain minor changes with the help of the auxiliary element also on the Au-βenkontur. For this it is only necessary to replace the auxiliary element. The press mold can otherwise remain unchanged.
Bevorzugterweise ordnet man zumindest in einem Teilbereich der Wand mehrere Lagen des Kunststoff-Halbzeugs übereinander an. Damit lassen sich bestimmte Bereiche der Wand gezielt verstärken, wenn dies gewünscht oder erforderlich ist. Eine Verstärkung kann beispielsweise dann zweckmäßig sein, wenn in diesem Teilbereich der Wand Befestigungselemente angeordnet werden sollen.Preferably, at least in a partial area of the wall, a plurality of layers of the plastic semifinished product are arranged one above the other. In this way, certain areas of the wall can be selectively strengthened, if desired or required. A reinforcement can be useful, for example, if fastening elements are to be arranged in this partial area of the wall.
Auch ist von Vorteil, wenn man im zweiten Abschnitt zusätzlich zu den Randabschnitten mindestens eine weitere Lage Kunststoff-Halbzeug verwendet. Der zweite Abschnitt dient vielfach dazu, Wirkelemente, beispielsweise Legenadeln oder dergleichen, festzuhalten. Auch hier kann dann eine Verstärkung sinnvoll sein.It is also advantageous if, in addition to the edge sections, at least one further layer of semi-finished plastic material is used in the second section. The second section is often used to hold knitting elements, such as guide needles or the like. Again, then a reinforcement may be useful.
Vorzugsweise verwendet man im zweiten Abschnitt Kunststoff-Halbzeuge mit unterschiedlichen Vorzugsrichtungen. Damit wird eine verbesserte Stabilität der Barre sowohl in Längs- als auch in Querrichtung erreicht.Preferably used in the second section plastic semi-finished products with different preferred directions. Thus, an improved stability of the bar is achieved both in the longitudinal and in the transverse direction.
Die Aufgabe wird bei einer Kunststoff-Wirkwerkzeugbarre der eingangs genannten Art dadurch gelöst, daß an der Innenseite der Wand ein Schlauch angeordnet ist.The object is achieved in a plastic Wirkwerkzeugbarre of the type mentioned fact that on the inside of the wall, a hose is arranged.
Wie oben im Zusammenhang mit dem Verfahren erläutert worden ist, kann der Schlauch beim Herstellen der Barre verwendet werden, um einen Druck im Innenraum aufzubauen, der das Kunststoff-Halbzeug von innen nach außen gegen die Pressenform drückt. Dabei verklebt der Schlauch mit dem Kunststoff-Halbzeug, wenn das Kunststoff-Halbzeug aushärtet. Der Schlauch verbleibt dann zwar in der Barre. Dort trägt er aber nicht nennenswert zu einer Massenerhöhung bei, so daß er nicht weiter stört.As has been explained above in connection with the method, the tube can be used in the production of the bar to build a pressure in the interior, which presses the plastic semi-finished product from the inside out against the press mold. The tube sticks to the plastic semifinished product when the plastic semifinished product cures. The tube then remains in the bar. But he does not wear anything worth mentioning to a mass increase, so that he does not bother.
Vorzugsweise ist der Schlauch aus einem temperaturbeständigen Kunststoff, insbesondere Polyethylenterephthalat, gebildet. Der Schlauch hält also die Temperaturen aus, die beim Aushärten des Kunststoff-Halbzeugs entstehen. Damit läßt sich der Druck, der im Innern des Schlauchs beim Herstellen der Barre erzeugt wird, bis zu einem Zeitpunkt aufrecht erhalten, an dem der Kunststoff ausgehärtet ist.Preferably, the tube is formed of a temperature-resistant plastic, in particular polyethylene terephthalate. The tube thus keeps out the temperatures that arise during curing of the plastic semifinished product. Thus, the pressure generated in the interior of the tube during manufacture of the bar can be maintained until a time at which the plastic has cured.
Vorzugsweise weist der Schlauch eine Wandstärke von maximal 0,5 mm, insbesondere maximal 0,05 mm auf. In einer bevorzugten Ausgestaltung weist der Schlauch eine Wandstärke von 0,025 mm auf. Der Schlauch selbst muß keine größere mechanische Festigkeit aufweisen. Er legt sich beim Erzeugen des Drucks von innen an das Kunststoff-Halbzeug an, das sich wiederum an der Pressenform abstützt. Dementsprechend besteht auch bei sehr dünnen Wandstärken praktisch keine Gefahr, daß der Schlauch durch die Druckerzeugung beschädigt wird.Preferably, the tube has a wall thickness of not more than 0.5 mm, in particular not more than 0.05 mm. In a preferred embodiment, the tube has a wall thickness of 0.025 mm. The hose itself does not have to have greater mechanical strength. He puts himself in creating the pressure from the inside of the plastic semi-finished, which in turn is supported on the press mold. Accordingly, even with very thin wall thicknesses there is virtually no danger that the hose will be damaged by the generation of pressure.
Vorzugsweise sind zumindest in einem Teilbereich der Wand mehrere Lagen eines Kunststoff-Halbzeugs übereinander angeordnet. Man kann in diesen Teilbereichen die Wand gezielt verstärken, um dort beispielsweise Befestigungselemente unterzubringen.Preferably, at least in a partial region of the wall, a plurality of layers of a plastic semifinished product are arranged one above the other. You can selectively reinforce the wall in these areas to accommodate, for example, fasteners there.
Auch ist von Vorteil, wenn im zweiten Abschnitt zusätzlich zu den Randabschnitten mindestens eine weitere Lage des Kunststoff-Halbzeugs angeordnet ist. Damit läßt sich der zweite Abschnitt verstärken, so daß er für die Befestigung von Wirkelementen verwendet werden kann.It is also advantageous if, in addition to the edge sections, at least one further layer of the plastic semifinished product is arranged in the second section. Leave it strengthen the second section so that it can be used for the attachment of active elements.
Auch ist von Vorteil, wenn bei mehreren übereinander angeordneten Lagen des Kunststoff-Halbzeugs mindestens zwei Lagen unterschiedliche Vorzugsrichtungen aufweisen. Bei der Verwendung von UD-Prepregs zum Erzeugen der Barre wird man also beispielsweise ein Prepreg verwenden, dessen Vorzugsrichtung in Längsrichtung der Barre orientiert ist, und ein anderes, dessen Vorzugsrichtung quer zur Längsrichtung der Barre orientiert ist. Damit ergeben sich relativ hohe Festigkeiten. Auch verschiedene andere Winkelstellungen können gelegt werden.It is also advantageous if, in the case of several layers of the plastic semi-finished product arranged one above the other, at least two layers have different preferred directions. When using UD prepregs for producing the Barre so you will use, for example, a prepreg whose preferred direction is oriented in the longitudinal direction of the bar, and another whose preferred direction is oriented transversely to the longitudinal direction of the bar. This results in relatively high strengths. Various other angular positions can be set.
Die Erfindung wird im folgenden anhand von bevorzugten Ausführungsbeispielen in Verbindung mit der Zeichnung beschrieben. Hierin zeigen:
- Fig. 1
- die Hälfte einer Pressenform mit eingelegtem Kunststoff-Halbzeug und eingelegtem Schlauch,
- Fig. 2
- die andere Hälfte der Pressenform,
- Fig. 3
- die Pressenform im geschlossenen Zustand,
- Fig. 4
- eine Barre in schematischer Querschnittsansicht,
- Fig. 5
- eine abgewandelte Ausführungsform einer Pressenform mit eingelegtem Kunststoff-Halbzeug,
- Fig. 6
- die Pressenform nach
Fig. 5 beim Erzeugen der Barre, - Fig. 7
- die Barre im Querschnitt,
- Fig. 8
- eine andere Ausführungsform einer Barre,
- Fig. 9
- die Barre nach
Fig. 8 beim Erzeugen in der Pressenform und - Fig. 10
- eine schematische Darstellung mehrerer Kunststoff-Halbzeug-Lagen.
- Fig. 1
- half of a press mold with inserted plastic semi-finished product and inserted hose,
- Fig. 2
- the other half of the press mold,
- Fig. 3
- the press mold in the closed state,
- Fig. 4
- a bar in a schematic cross-sectional view,
- Fig. 5
- a modified embodiment of a press mold with inserted plastic semi-finished product,
- Fig. 6
- the press shape after
Fig. 5 when creating the barre, - Fig. 7
- the bar in cross section,
- Fig. 8
- another embodiment of a barre,
- Fig. 9
- the barre after
Fig. 8 when producing in the press mold and - Fig. 10
- a schematic representation of several plastic semi-finished layers.
Die erste Hälfte 1 weist einen Pressenhohlraum 4 auf, in dem ein Hilfselement 5 angeordnet ist. Das Hilfselement 5 bildet mit der ersten Hälfte 1 der Pressenform einen Spalt 6, der von dem Pressenhohlraum 4 zu einem Entlüftungskanal 7 führt.The
Die Pressenform 2 weist auch eine zweite Hälfte 8 auf, die ebenfalls einen Pressenhohlraum 9 aufweist.The
Bevor die zweite Hälfte 8 mit der ersten Hälfte 1 verbunden wird, wird ein Kunststoff-Halbzeug 10 in Form eines mehrschichtigen Prepregs, vorzugsweise UD-Prepregs, in den Hohlraum 4 eingelegt. Bei einem UD-Prepreg werden die einzelnen Schichten zweckmäßigerweise in unterschiedliche Richtungen ausgerichtet, so daß beispielsweise benachbarte Lagen einen Winkel von 90° (andere Winkel sind möglich) einschließen. Dabei kommt ein Randabschnitt 11 des Kunststoff-Halbzeugs 10 auf dem Hilfselement 5 zu liegen. Das Kunststoff-Halbzeug 10 kleidet dann den Pressenhohlraum 4 aus, im vorliegenden Fall V-förmig. In die dadurch gebildete Vertiefung wird ein Schlauch 12 eingelegt, der aus Gründen der Übersicht in
Im Bereich der beiden Randabschnitte 11, 13 ist der lichte Abstand zwischen den beiden Pressenhälften 1, 8 etwas kleiner als das Doppelte der Dicke des Kunststoff-Halbzeugs 10 im nicht verpreßten Zustand, so daß man durch das Schließen der Pressenform 2 einen Druck auf die beiden Randabschnitte 11, 13 ausüben kann. Die beiden Randabschnitte 11, 13 des Kunststoff-Halbzeugs werden auf diese Weise miteinander verpreßt. Sie bilden damit einen zweiten Abschnitt b der Barre (
Wenn die Pressenform 2 geschlossen ist, wie in
Dabei kann man den Schlauch 12 ohne weiteres im Innenraum 18 belassen. Der Schlauch 18 ist aus einem Kunststoff gebildet, der die beim Aushärten des Kunststoff-Halbzeugs 10 auftretenden Temperaturen aushält, ohne beschädigt zu werden. Ein geeignetes Material hierfür ist beispielsweise Polyethylenterephthalat. Der Schlauch selbst benötigt keine größere mechanische Stabilität. Dementsprechend reicht eine Wandstärke von beispielsweise 0,025 mm aus. Beim Aushärten des Kunststoff-Halbzeugs 10 kann der Schlauch 12 ohne weiteres mit der Wand 17 verkleben. Er verbleibt dann in der fertigen Barre 3. Er ist aus Gründen der Übersicht in
Selbstverständlich ist es möglich, den Innenraum 18 mit einem leichten Kunststoff auszuschäumen, wenn dies erforderlich sein sollte. In der Regel wird man aber auch eine hohle Barre 3 verwenden können.Of course, it is possible to foam the interior 18 with a light plastic, if necessary. In general, but you will also be able to use a
Durch den Spalt 6 zwischen dem Hilfselement 5 und der ersten Hälfte 1 der Pressenform kann Gas zum Entlüftungskanal 7 hin entweichen, wenn der Schlauch 12 unter Druck gesetzt wird. Dementsprechend kann man an der unteren Kante der Barre 3 eine relativ spitze Form erzeugen. An der rechten oberen Kante (bezogen auf die Darstellung der
Die
Aus Gründen der Einfachheit ist hier in der ersten Hälfte der Pressenform 1 das Hilfselement 5 weggelassen worden. Während man bei der Ausgestaltung nach den
Man kann eine derartige Verstärkungszone 17a allerdings auch dadurch bilden, daß man, wie in
Wenn nun bei derartigen Barren Änderungen der Wandstärke im ein oder anderen Bereich erforderlich werden, dann kann man diese Änderung der Wandstärke einfach dadurch realisieren, daß man in den Innenraum, also zwischen Kunststoff-Halbzeug 10 und Schlauch 12, weiteres Kunststoff-Halbzeug einbringt, das dann beim Druckbeaufschlagen des Schlauchs 12 mit dem Kunststoff-Halbzeug 10 verpreßt wird. Die äußere Form der Barre 3 ändert sich nicht. Lediglich im Innern ergeben sich dann unterschiedliche Verstärkungsarten. Der Schlauch 12 ist in
Das Kunststoff-Halbzeug 20a ist in Form einer Ω-förmigen Schleife um den Schlauch 12 herumgelegt, so daß seine Randabschnitte 11, 13 übereinander liegen. Diese beiden Randabschnitte 11, 13 sind durch die beiden anderen Kunststoff-Halbzeuge 20b, 20c voneinander getrennt. Dadurch entstehen vier Lagen, die durch die Druckbeaufschlagung der beiden Hälften 1, 8 der Pressenform 2 miteinander verpreßt werden.The plastic
Unterhalb der Unterseite des Kunststoff-Halbzeugs 20a ist das Kunststoff-Halbzeug 20d angeordnet, das mit der unteren Wand 17b der Wand 17 durch die Druckbeaufschlagung des Schlauchs 12 verpreßt wird.Below the underside of the plastic
Anstelle der dargestellten rechtwinkligen Ausrichtung der einzelnen Prepregs lassen sich auch andere Winkelverhältnisse realisieren.Instead of the illustrated rectangular orientation of the individual prepregs, other angular relationships can also be realized.
Durch die Wahl von mehreren oder weniger übereinander liegenden Prepreg-Lagen läßt sich die Dicke der Barre, genauer gesagt die Dicke der Wandstärke, verändern. So lassen sich auf einfache Weise verstärkte Bereiche erzeugen.By choosing several or less superimposed prepreg layers, the thickness of the bar, more precisely, the thickness of the wall thickness change. This makes it easy to create reinforced areas.
Claims (16)
- Method for producing a plastic knitting tool bar which has a first portion (a), in which a wall (17) surrounds an inner space (18), and a second portion (b), in which marginal portions (11, 13) of the wall (17) are arranged one above the other, in which method a sheet-like plastic semi-finished product (10; 10a, 10b; 20a-20d) is introduced into a press mould and is acted upon with pressure for the purpose of pressing the second portion (b), characterized in that, during pressing, the inner space (18) is acted upon with internal pressure by means of a pressure fluid.
- Method according to Claim 1, characterized in that the plastic semi-finished product used is a prepreg (21a-21e), in particular a UD prepreg.
- Method according to Claim 1 or 2, characterized in that a hose (12) is introduced together with the plastic semi-finished product (10; 10a, 10b; 20a-20d) into the press mould (2), and the plastic semi-finished product (10; 10a, 10b; 20a) is led around the hose (12), the hose (12) being put under pressure.
- Method according to Claim 3, characterized in that the hose (12) is left in the inner space (18).
- Method according to Claim 3 or 4, characterized in that a hose (12) consisting of a temperature-resistant plastic, in particular polyethyleneterephthalate, is used.
- Method according to one of Claims 3 to 5, characterized in that a hose (12) with a wall thickness of at most 0.5 mm, in particular of at most 0.05 mm, is used.
- Method according to one of Claims 1 to 6, characterized in that a press mould (2) is used, into which is introduced an auxiliary element (5) which is arranged between a press cavity (4) and a venting duct (7).
- Method according to one of Claims 1 to 7, characterized in that a plurality of layers (10a, 10b; 20a, 20d) of the plastic semi-finished product are arranged one above the other at least in a part-region (17a) of the wall (17).
- Method according to one of Claims 1 to 8, characterized in that at least one further layer (20b, 20c) of the plastic semi-finished product is used in the second portion (b) in addition to the marginal portions (11, 13).
- Method according to one of Claims 1 to 9, characterized in that plastic semi-finished products with different preferred directions are used in the second portion (b).
- Plastic knitting tool bar with a first portion (a), in which a wall (17) surrounds an inner space (18), and a second portion (b), in which the wall (17) is continued with two marginal portions (11, 13) and in which the marginal portions (11, 13) are arranged one above the other, characterized in that a hose (12) is arranged on the inside of the wall (17).
- Bar according to Claim 11, characterized in that the hose (12) is formed from a temperature-resistant plastic, in particular polyethyleneterephthalate.
- Bar according to Claim 11 or 12, characterized in that the hose (12) has a wall thickness of at most 0.5 mm, in particular of at most 0.05 mm.
- Bar according to one of Claims 11 to 13, characterized in that a plurality of layers of a plastic semi-finished product are arranged one above the other at least in a part-region (17a) of the wall (17).
- Bar according to one of Claims 11 to 14, characterized in that at least one further layer (20b, 20c) of the plastic semi-finished product is arranged in the second portion (b) in addition to the marginal portions (11, 13).
- Bar according to Claim 14 or 15, characterized in that, in the case of a plurality of layers of the plastic semi-finished product which are arranged one above the other, at least two layers have different preferred directions.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200610005703 DE102006005703A1 (en) | 2006-02-08 | 2006-02-08 | Molding a hollow reinforced plastic needle bar for warp knitting machine uses a thin tube which is inflated to act as core and is then left in position |
Publications (2)
Publication Number | Publication Date |
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EP1820891A1 EP1820891A1 (en) | 2007-08-22 |
EP1820891B1 true EP1820891B1 (en) | 2010-07-21 |
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ID=38161954
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EP20060024253 Active EP1820891B1 (en) | 2006-02-08 | 2006-11-23 | Method of making a warp knitting element carrying bar of synthetic material and bar of synthetic material for warp knitting elements |
Country Status (3)
Country | Link |
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EP (1) | EP1820891B1 (en) |
CN (1) | CN101015954B (en) |
DE (2) | DE102006005703A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2770096A1 (en) | 2013-02-22 | 2014-08-27 | Karl Mayer Textilmaschinenfabrik GmbH | Warp knitting element carrying bar of synthetic material |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
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ES2370963T3 (en) * | 2009-03-19 | 2011-12-26 | Karl Mayer Textilmaschinenfabrik Gmbh | TOOLING TOOL BAR. |
DE102010044673B4 (en) | 2010-09-08 | 2014-01-09 | Karl Mayer Textilmaschinenfabrik Gmbh | Impact tool bar repair kit and impact tool bar |
DE102010045049B4 (en) | 2010-09-10 | 2012-10-04 | Karl Mayer Textilmaschinenfabrik Gmbh | Method for producing a knitting tool bar |
CN105034356A (en) * | 2015-03-12 | 2015-11-11 | 苏州复威新材料有限公司 | High-thickness soft block-like EVA material production process |
CN110344172B (en) * | 2019-08-06 | 2023-09-08 | 宁波丽成复合材料制品有限公司 | High-speed fine braiding machine spinning needle carbon fiber base |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
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DE19803965B4 (en) * | 1998-02-02 | 2010-07-22 | Vereinigung zur Förderung des Instituts für Kunststoffverarbeitung in Industrie und Handwerk an der Rhein.-Westf. Technischen Hochschule Aachen eV | Process for the production of hollow bodies of thermoplastics with long and / or continuous fiber reinforcement |
DE20314470U1 (en) * | 2003-09-18 | 2003-11-20 | Mayer Malimo Textilmaschf | Composite material lay-up for load-bearing spar in textile machine has guide and clamp surfaces on the hollow spar for inserts with apertures for clamping screws |
DE102004023802B3 (en) * | 2004-05-13 | 2005-12-22 | Liba-Maschinenfabrik Gmbh | Multiple needle knitting machine for industrial use has drive shaft, levers and bars carrying rows of needles all made of carbon fiber reinforced plastics with same coefficient of thermal expansion |
ES2303001T3 (en) * | 2004-05-27 | 2008-08-01 | Karl Mayer Textilmaschinenfabrik Gmbh | TOOLING TOOL BAR. |
-
2006
- 2006-02-08 DE DE200610005703 patent/DE102006005703A1/en not_active Withdrawn
- 2006-11-23 DE DE200650007474 patent/DE502006007474D1/en active Active
- 2006-11-23 EP EP20060024253 patent/EP1820891B1/en active Active
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2007
- 2007-02-08 CN CN2007100054425A patent/CN101015954B/en active Active
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2770096A1 (en) | 2013-02-22 | 2014-08-27 | Karl Mayer Textilmaschinenfabrik GmbH | Warp knitting element carrying bar of synthetic material |
Also Published As
Publication number | Publication date |
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EP1820891A1 (en) | 2007-08-22 |
CN101015954B (en) | 2010-10-20 |
DE502006007474D1 (en) | 2010-09-02 |
DE102006005703A1 (en) | 2007-08-16 |
CN101015954A (en) | 2007-08-15 |
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