DE8417960U1 - FAST RUNNING CRAWLE FOR FLEECE MAKING THERMOPLASTIC FIBERS - Google Patents

Description

IDrM h'Q .: W-A'LT ER STRONG

FATE N ADVERTISER
Moerser Strasse 140 D-4150 Krefeld 1 ¹ S "(021 51) 28222 and 20469 03 8 53 571

Ramisch Kleinewefers GmbH, Neuer Weg 24-40, 4150 Krefeld

Cut 1 open card for forming fleece from thermoplastic fibers

The invention relates to a fast running card for web formation from thermoplastic fibers, - from support table, feed rollers, pre-rollers, at least one main roll with associated workers and turner and doffer rolls, wherein the rollers have toothed surfaces.

With carding of this type, the fibers are fed in from the support table via the feed rollers to the pre-rollers, which take care of the so-called pre-opening. This is done in the area of the main roller Fleece is formed with longitudinally oriented fibers and then random layers are formed. That's done * Fleece is then removed from the take-off rollers. All rollers of a card are with one set made of a flat wire with a tooth shape suitable for the respective function exists, which is drawn onto the corresponding roller so that the entire roller surface with Teeth is covered.

Deutsche Bank AG Krefeld 103/1525 BLZ 32θ? ΌΌ & 0 · - Sparkasse Kiti & of 3 <fc7 ± BLZ 32050000 - Postal check Essen 4055-431 Bl PATENT ADVERTISER DR. STARK ·, M Of R ^ Ep ■ STR. ] 40. ·: Q * J50 KREFELD · & (02151) 28222 and 20469 · Qg] 853578

The course of the goods from the opened fleece template to the acceptance of the finished fleece fleece is determined by the direction of rotation and tooth shape of the individual rollers. Steps behind the pick-up rollers an unconsolidated pile defined in the orientation of the fibers, its distribution in relation to should be as similar as possible to weight and orientation.

However, there are limits to the performance of known clutter, both in terms of output as well as the distribution of the fibers in the pile. Namely, occur at the roller pairings relatively high peripheral speeds of up to 2000m / minute. The Roller gaps are considerable due to the fiber friction Free quantities of heat that accumulate. The built-up frictional heat flows over the roll neck and storage, however, a temperature saturation profile develops over the course of the operating time over the length of the rollers, the temperatures being highest in the middle area of the rollers and remove to the end faces of the rollers. Such a thermally loaded roller expands accordingly the temperature profile. In particular, the dimensions of the nips are reduced in the middle area of the roller, which is where additional heat is released. on the other hand is the saturation temperature at which equilibrium is reached between the frictional heat released and the amount of heat dissipated, already at mean velocities above the melting point of the fibers. Because of this, the manufacturing process becomes especially with low-melting fibers,

PATENT ADVOCATE DR. StAfJK ;; MC> ER3Efl 6TR. 140 * "Q-" 4150 KREFELD "S ¹ (02151) 28222 υ. 20469 (Β 853578

whose melting temperature is around 100 °, interrupted by clumping of the fibers. This will be also damaged the trimmings.

In order to nevertheless achieve greater production outputs with cards of the type described at the beginning, several cards with a lower fiber throughput and thus limited heating are used. The correspondingly lighter fleece webs are then brought together and consolidated together. But even here, the precision of distribution and random layers of each individual card is limited, because an increase in the roller diameter in the middle area cannot be prevented, but rather is only reduced to a tolerable level.

Another significant disadvantage of known cards arises when the gap adjustment of the individual Rollers for different products. All nips can only be correct at room temperature adjusted. The set roller gaps are on the order of a few tenths Millimeters. However, the diameter of a random roller increases by this amount with approx. 500 Millimeter diameter, which is heated from room temperature to 50 °. Before a gap adjustment So you have to wait until the card has cooled down to room temperature.

The object of the invention is to provide a card of the type described above, which highest production output with the greatest uniformity of orientation and weight distribution of the produced fleece allows.

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IT ADVOCATE DR. STAHtK! ι IW0ER3EJ1 % Tfi. iM. '. Oi *) SO KREFELD - & (02151) 28222 U. 20469 ■ Qx] 853578

This object is achieved in that at least the most thermally loaded rollers as Tempering rollers are formed which have channels through which a tempering medium flows. The channels can be arranged in particular in the area of the roll shell. You should Extend substantially the entire length of a roller, so that the roller surface assumes a uniform temperature.

According to the invention, by means of suitable temperature control In particular, the rollers with the highest thermal loads, the roller shell of these rollers in one defined, predetermined temperature range maintained. As a result, the material throughput can be quite significant can be increased. The limit is given when the fibers reach the melting temperature by self-friction reach. According to the invention, the rollers are deformed as a result of uneven temperature distribution switched off. The exact cylindrical shape of the rollers is retained. An adjustment can always be made in defined, specified temperature range and is therefore possible at any time. Even during During operation or with temperature-controlled rollers, fine adjustment of the roller gap is possible. Fine adjustment can also be made by raising or lowering the roller temperature. The distribution of the pile over the length of the roll is not affected because the cylinder shape the roller does not change.

Preferably, in the area of the channels carrying the temperature control medium or on at least one temperature-controlled channel A temperature sensor as an actual value transmitter for a control system for the roller in the area of its surface

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PATENT ADVOCATE DR- «ΓΑ & Κ. · MCjERSOFi STB. 1 «1 *: d ^ 150 KREFELD -" g "(02151) 28222 and 20469 - [§J 853578

Temperature of the Temperiermitteis and / or the rollers can be provided. The scheme enables an automatic dissipation of the respective amounts of heat produced in such a way that the roller temperature always constant and thus the cylinder shape and the set roller gaps are retained. Preferably, tempered water with a temperature that is slightly higher than room temperature is used is. If the heat load on a roller is so great that the amount of heat released with the temperature control medium the respective temperature cannot be dissipated, is controlled by the control colder water supplied. The limit of the temperature control is then due to the possible formation of condensation given on the surface of the rollers.

The following is a shown in the drawing Embodiment of the invention explained; the single figure shows a schematic representation of a longitudinal section through a card for web formation made of thermoplastic fibers.

The card shown consists in its basic structure of a support table 1 with associated feed roller 2. The feed roller 2 takes the thermoplastic materials placed on the support table 1 Fibers 3 and transfers them to a pre-roller pair 4, which the fibers 3 of a main roller 5 leads. On the circumference of the main roller 5 turner 6 and workers 7 are arranged, the create a fleece with longitudinal orientation of the fibers.

The main shaft 5 is a pair of random rollers 8 PATENT ADVOCATE Da ^ TASlK. · MdERSöisTR. 140 '· iD, 4150 KREFELD · "g» (02151) 28222 and 20469 · [g] 853578

■■■ < ■■ J

downstream, which removes the fleece from the main roll 5, and a pair of take-off rolls 9
feeds. Located behind the pair of doffing rollers 9
a pair of press rollers 10 to solidify the
produced fleece 11.

All rollers are equipped with a set,

made from a flat wire with for the respective

Function of a suitable tooth shape, which is based on %

the corresponding roller is drawn up in such a way that |

the entire roller surface covered with teeth i

is. The directions of rotation of the individual rollers |

are indicated in the drawing by arrows. |

According to the invention, at least the thermal }.

the most heavily loaded rollers, e.g. the main i

roller 5 and the random orientation roll pair 8 as a _tempering:;

rollers formed, which are controlled by a temperature control X

Have flow-through channels. These channels are '■■

not shown in detail, they are in the area

of the roll shell arranged and extend ·

essentially the entire length of a

Roller, so that the roller temperature is kept constant

will.

In the area of the temperature control medium leading
Channels or at least one tempered
Roller in the area of its surface is a no
temperature sensor shown as actual value transmitter
a control for the temperature of the temperature control medium and / or the roller is provided. The regulation
ensures compliance with a uniform

Roller temperature, so that over the length '

no temperature distribution on the roller J

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PATENT ADVOCATE DR. ÄtAftK. · MOERdER. 8TR »f4tt '· ί> -Λ150 KREFELD ·' S" (02151) 28222 u, 20469 · | g] 853578 '"

and the roller temperature remains at the set value under all operating conditions. In particular, the exact cylindrical shape of the rollers and the set roller gaps are retained do not change during operation.

Before starting operation or starting adjustment work, the temperature control medium is a heating medium, with which the desired roller temperature is set. This is during operation Temperature control means a coolant »which dissipates the heat that is generated.

Claims (5)

• Dr.MtTO: W.ALTE R STARK PATE NTANWALT Moerser Straße 140 D-4150 Krefeld 1 'S "C02151) 28222 and 20469 BS 8 53 Claims: 1. Cut out running cards for web formation thermoplastic fibers, - from support table, feed rollers, pre-rollers, at least one Main roll with assigned workers and turners as well as doffer rolls, with the Wa'ize have serrated surfaces, thereby characterized in that at least the most thermally loaded rollers (5, 8) are used as cooling rollers are formed which have channels through which a coolant flows. 2. Card according to claim 1, characterized in that the channels in the region of the roll shell are arranged. 3. Card according to claim 1 or 2, characterized in that the channels are substantially Extend the entire length of a roller. 4. Card according to one of claims 1 to 3, characterized in that in the area of the temperature control channels leading to at least one temperature sensor as an actual value transmitter Deutsche Bank AG Krefeld 103/1525 BLZ 32δ? Β08Ο. äparkaise: KrelonJ.3CS72i BLZ 32050000 ■ Postal check Essen 4055 «! Bank code 3ΘΟΙΟΟ43 ft · Γ ■ JTANWAL7 DR / fcTARK, - 'MOEfJSe ^ STR] Mq (.B- ^ 150 KREFELD · "g? (02151) 28222 u. 20469. Qg 85357B Regulation for the temperature of the temperature control medium and / or the rollers is provided. 5. card according to one of claims 1 to 4, characterized in that at least a temperature control roller in the area of its surface a temperature sensor as an actual value transmitter Regulation for the temperature of the temperature control medium and / or the roller are provided.