CN212832118U

CN212832118U - Paraffin distribution device, winding unit and winding machine

Info

Publication number: CN212832118U
Application number: CN202021158835.7U
Authority: CN
Inventors: 伊万·贝尔托洛; 贾科莫·马尔凯西; 乔治·科隆贝罗托
Original assignee: Savio Macchine Tessili SpA
Current assignee: Savio Macchine Tessili SpA
Priority date: 2019-06-21
Filing date: 2020-06-19
Publication date: 2021-03-30
Anticipated expiration: 2030-06-19
Also published as: EP3753889A1; CN112110292A

Abstract

The application relates to a paraffin distribution device, a winding unit and a winding machine. A paraffin dispensing device (12) for a winding unit (14) comprising a first paraffin dispenser (20) comprising: a first support (202) adapted to partially house a first wax element (204), and a first motorized device (206) adapted to rotate said first wax element (204) about a first rotation axis (X). The paraffin distribution device comprises a second paraffin distributor (40) comprising: -a second support (402) adapted to partially house a second wax element (404), and-second motorised means (406) adapted to rotate said second wax element (404) about a second axis of rotation (Y). The first axis of rotation (X) and the second axis of rotation (Y) are parallel to each other. The paraffin wax distribution device of the present application allows for a uniform and constant distribution of paraffin wax over the entire length of the yarn.

Description

Paraffin distribution device, winding unit and winding machine

Technical Field

The utility model relates to a paraffin distribution device, including the device's winding unit and including this winding unit's winder.

Background

As is known, industrial winding machines comprise a plurality of mutually independent winding units, managed by a programmable control unit.

It is to be noted that the term "thread" or "monofilament" or "continuous filament" refers to a single filament or continuous burr (burr) (for example, in the case of silk, artificial or man-made fibers), while the term "yarn" refers to a set of fibrils of variable length connected in parallel by twisting. In the following, we will use either term indiscriminately, which means that the application of the invention is not limited to one type or the other.

The winding unit winds the yarn onto a generally conical support to make a spool. The yarn is wound onto the support in a predetermined type of winding to optimize the unwinding of the yarn from the spool.

The winding unit is made of a yarn guide, which may be generally: with an eyelet, with an alternating rectilinear motion, very close to the outer surface of the mandrel, or with a cylinder rotating about an axis substantially parallel to the mandrel, arranged with seats made on the surface thereof with a specific geometry.

The yarn guide drum is called a traversing throat and simulates the movement of the movable eye.

In this respect, the winder may be provided with a paraffin distribution device on which the yarn slides before coming into contact with the yarn guide.

The paraffin wax dispensing device is primarily mounted on a winding unit that requires lubrication of the yarn for further processing, such as knitting. In this case, the yarn to be inserted into the needle is precisely lubricated to allow the yarn to smoothly slide through the needle without causing breakage or adverse effects such as excessive tension variations. Therefore, such lubrication must be as uniform as possible.

In terms of positioning, the paraffin dispensing device may be positioned before, or after, the knotting device or the yarn cleaner, for example, depending on the layout of the machine.

The device comprises a support adapted to partially support the paraffin so that it can protrude and come into contact with the yarn.

Under the same processing conditions, an effective distribution of the paraffin wax on the yarn can reduce the friction coefficient by as much as 50%. However, over-dispensing may increase the coefficient of friction, conversely.

It is well known that paraffin distribution is affected by many variables, such as, for example, yarn type, paraffin type, specific paraffin properties, environmental conditions during winding, yarn moisture and air conditioning, interference of the paraffin with the yarn path, paraffin rotation speed, and winding speed.

One of the most serious problems with paraffin coating relates to the uniformity of distribution over the yarn. In particular, if the lubricating properties vary greatly along the yarn, the subsequent treatment will be affected, in particular in the case of knitting.

Attempts have been made in the prior art to improve the uniformity of paraffin distribution by proposing various solutions.

First, attempts have been made in the prior art to establish a specific correlation between the type of paraffin and the yarn, for example, a specific type of paraffin is proposed according to the type of fiber, the yarn structure, the yarn moisture and the ambient temperature and humidity conditions.

It is clear that the number of parameters to be considered is very high and their continuous variability does not allow easy selection of the type of paraffin. An example is the change in environmental conditions in a building where coiling occurs.

When the desired degree of paraffin coating cannot be achieved by acting on the above parameters, the reel with the yarn that has undergone paraffin coating is generally reloaded into the winder for further lubrication and a new reel is formed to improve the distribution of the paraffin. It is assumed that this new winding and the subsequent lubrication of the new yarn aim at lubricating the parts of the yarn surface that are less paraffin-coated than the first winding.

Although effective, this operation doubles the processing time and subjects the yarn to greater stresses, with the risk of deteriorating its quality parameters, since each reel requires two successive winding operations.

SUMMERY OF THE UTILITY MODEL

Accordingly, it is believed that there is a need to address, at least in part, the above-mentioned shortcomings and limitations with reference to the prior art.

Accordingly, it is believed desirable to provide a paraffin dispensing apparatus that does not address the disadvantages of the prior art.

In particular, it is considered that there is a need for a paraffin distribution device that allows a uniform and constant distribution of paraffin over the entire length of the yarn.

Furthermore, it is felt the need of a device for increasing and improving the distribution of the paraffin wax, making it possible to obtain a lower coefficient of friction and a relative coefficient of variation, thus allowing improvements in the subsequent processing steps, for example in the knitwear sector.

Furthermore, it is felt the need of a winding unit with a very low coefficient of variance which allows to obtain a reel in which the yarn has a low and uniform friction coefficient.

Furthermore, it is felt the need of a winder which allows to obtain a low and uniform friction coefficient with a single yarn winding operation.

According to coiling mechanism, winder unit and winder all satisfied above-mentioned requirement.

According to the utility model discloses a paraffin distributor for the winding unit, including first paraffin distributor, first paraffin distributor includes: a first support adapted to partially house a first wax element and a first motorized means adapted to rotate the first wax element about a first axis of rotation; the paraffin distribution device comprises a second paraffin distributor, and the second paraffin distributor comprises: a second support adapted to partially house a second wax element and a second motorized device adapted to rotate the second wax element about a second axis of rotation; the first and second axes of rotation are parallel to each other.

Further, the first support comprises a substantially cylindrical element, the inside of which is able to house the first paraffin element, the substantially cylindrical element being arranged at one end with thrust means adapted to advance the first paraffin element protruding from an outlet end opposite to the one end.

Further, the second support comprises a substantially cylindrical element, the inside of which is able to house the second wax element, the substantially cylindrical element being provided at one end with suitable thrust means for pushing the second wax element protruding from an outlet end opposite to the one end.

Further, the first motorized device and the second motorized device comprise pulsed dc synchronous motors with step-wise electronic management.

Further, the first paraffin distributor and the second paraffin distributor are positioned so that their axes of rotation are perpendicular to the direction of extension of the yarn.

Further, the first wax distributor overlaps the second wax distributor in the direction of the yarn extension.

Further, the first wax distributor is adapted to rotate the first wax element in the same direction as the rotation of the second wax element adapted to be applied by the second wax distributor.

Further, the first wax dispenser is adapted to rotate the first wax element in a direction opposite to the rotation relative to the second wax element adapted to be applied by the second wax dispenser.

According to another embodiment of the present application, there is provided a winding unit comprising a paraffin dispensing device.

Further, the winding unit comprises a feed grid and a yarn cleaner, the paraffin distribution device being arranged between the feed grid and the yarn cleaner.

Further, the winding unit comprises a yarn cleaner and a yarn guide, the paraffin distribution device being arranged between the yarn cleaner and the yarn guide.

According to another embodiment of the present application, there is provided a winding machine comprising at least one winding unit.

Drawings

Other features and advantages of the invention will become more apparent from the following description of preferred embodiments, given by way of non-limiting example, in which:

fig. 1 is a schematic front view of a winding unit according to the invention.

Figure 2 schematically shows an enlarged portion of the winding unit in figure 1 relating to a paraffin dispensing device according to the invention;

fig. 3 schematically shows an enlarged portion of the winding unit in fig. 1 relating to a paraffin dispensing device according to the invention.

The same elements or components as those of the embodiments described below will be denoted by the same reference numerals.

Detailed Description

Fig. 1 shows a paraffin dispensing device for a winding unit 14 according to the invention, indicated by the reference numeral 12.

The wax dispensing device 12 includes a first wax dispenser 20.

The first wax distributor comprises a first support 202 adapted to partially accommodate a first wax element 204, and a first motorized means 206 adapted to rotate the first wax element 204 about a first axis of rotation X.

The wax dispensing device 12 further comprises a second wax dispenser 40.

The second wax dispenser 40 comprises a second support 402 adapted to partially house a second wax element 404, and a second motorized means 406 adapted to rotate the second wax element 404 about a second axis of rotation Y.

The first rotation axis X and the second rotation axis Y are parallel to each other.

According to a possible embodiment of the present invention, the first support 202 may comprise a substantially cylindrical element 208 inside which the first paraffin element 204 may be housed. A substantially cylindrical element 208, having an axis coinciding with the axis X, may be arranged at one end 210 having thrust means (not shown) adapted to push the first wax element 204 to protrude from an outlet end 212 opposite the aforementioned one end.

According to a possible embodiment of the invention, the thrust means may comprise elastic means, for example spring-loaded means of the type known to the skilled person. Advantageously, such thrust means may be arranged between the bottom 205 of the substantially cylindrical element 208 and the first wax element 204.

The first wax element 204 may be substantially cylindrical, provided with a central through hole.

According to a possible embodiment of the present invention, and with reference to the example in fig. 3, the thrust means are adapted to push the first wax element 204 towards the outside of the substantially cylindrical element, in particular against the first striker 214.

According to a possible embodiment of the present invention, the first striker 214 may comprise three circular supporting

pins

216, 218, 220, which project towards the outlet end 212 according to a direction parallel to the first rotation axis X. Advantageously, the three circular support pins 216, 218, 220 may be placed equidistant from each other along the circumference.

According to a possible embodiment of the invention, the first motor means 206 may comprise a synchronous motor of pulsed direct current, preferably with a brushless, step-by-step electronic manager (stepper motor).

Advantageously, as shown in fig. 3, the first motive device 206 may be disposed proximate the outlet end 212 of the first support 202.

According to a possible embodiment, the motorised means 206 may comprise a drive shaft 207 projecting from the motorised means 206 provided with a coupling end 209. In use, the drive shaft 207 is adapted to pass through the longitudinal bore of the wax element 204 to engage the base 205 of the generally cylindrical element 208.

According to a possible embodiment, the coupling between the base 205 and the coupling end 209 may be of the snap type.

According to a possible embodiment of the present invention, the second paraffin distributor 40 may be substantially equal to the first paraffin distributor 20.

In particular, the second support 402 may comprise a substantially cylindrical element (which may be indicated by 408 in the figure) having an axis coinciding with the rotation axis Y, inside which the second wax element 404 may be housed. The substantially cylindrical element may be arranged at one end with thrust means (not shown) adapted to push the second wax element 404 protruding from an outlet end opposite to the aforementioned one end.

According to a possible embodiment of the invention, the thrust means may comprise elastic means, for example spring-loaded means of the type known to the skilled person. Advantageously, such thrust means may be arranged between the bottom 405 of the substantially cylindrical element and the wax element 404.

The second wax element 404 may be substantially cylindrical, arranged with a central through hole.

According to a possible embodiment of the present invention, and with reference to fig. 3, the thrust means are adapted to push the second wax element 404 towards the outside of the substantially cylindrical element, in particular against the second striker 414.

According to a possible embodiment of the invention, the second striker 414 may comprise three circular supporting

pins

416, 418, 420 projecting towards the outlet end according to a direction parallel to the second rotation axis Y. Advantageously, three circular support pins 416, 418, 420 may be placed equidistant from each other along the circumference.

According to a possible embodiment of the present invention, the second motorised means 406 may comprise a synchronous motor of pulsed direct current, preferably brushless, step-by-step electronic manager (stepper motor).

Advantageously, as shown in fig. 3, a second motorized device 406 may be disposed near the exit end of the second support 402.

According to a possible embodiment, the motorised means 406 may comprise a driving shaft 407 protruding from the motorised means 406 provided with a coupling end 409. In use, the drive shaft 407 is adapted to pass through the longitudinal bore of the wax element 404 to engage the base 405 of the generally cylindrical element.

According to a possible embodiment, the coupling between the bottom 405 and the coupling end 409 can be of the snap type.

According to a possible embodiment of the present invention, shown by way of example in fig. 1, the first paraffin distributor 20 and the second distributor 40 are positioned so that their axes of rotation X and Y are perpendicular to the direction of extension of the yarn, shown by the reference Z in the figures.

According to a possible embodiment of the invention, not shown in the drawings, the first wax distributor 20 and the second wax distributor 40 are positioned in front of each other so that the first wax element 204 and the second wax element 404 face and are staggered along the yarn extension direction Z.

Advantageously, the first paraffin distributor 20 and the second paraffin distributor 40 may overlap along the yarn extension direction Z. This embodiment is shown in the drawings.

According to a possible embodiment of the invention, the first paraffin distributor 20 is adapted to rotate the first paraffin element 204 in the same direction as the rotation of the second paraffin element 404 adapted to be applied by the second paraffin distributor 40.

According to an alternative embodiment, the first wax dispenser 20 is adapted to rotate the first wax element 204 in a direction opposite to the rotation relative to the second wax element 404 adapted to be applied by the second wax dispenser 40.

This embodiment is particularly advantageous in that it provides a first paraffin distributor 20 and a second paraffin distributor 40 which overlap in the direction of extension of the yarn, in which direction they both have the same direction of rotation. In particular, the preferred direction of rotation is clockwise, considering the observer at the support pin.

According to a possible embodiment not shown in the drawings, the first paraffin dispenser 20 and the second paraffin dispenser 40 may share the same motorized means. For example, a motorized device 206 of the first wax dispenser 20 may be provided which also transmits motion to the second wax dispenser 40 via a transmission. Alternatively, a motorized device 406 of the second wax dispenser 40 may be provided which also transmits motion to the first wax dispenser 20 via a transmission.

According to a possible embodiment, the first wax element 204 and the second wax element 404 provide the same type of wax.

According to a possible alternative embodiment, the first wax element 204 and the second wax element 404 provide the same type of wax. This solution is particularly advantageous in the paraffin coating of certain types of yarn, such as multi-strand wound yarn and twisted yarn.

The winding unit 14 according to the present invention comprises a paraffin dispensing device 12 as described above.

In a manner known per se, the winding unit 14 can comprise a feed packet 70, a yarn cleaner 50, a yarn guide system 80 and a reel holder arm.

According to a possible embodiment of the present invention, the first wax distributor 20 and the second wax distributor 40 may be positioned between the yarn washer 50 and the yarn guide system 80.

According to an alternative embodiment of the present invention, the first wax distributor 20 and the second wax distributor 40 may be positioned between the feed grid and the yarn washer 50.

In yet another embodiment of the present invention, a first wax distributor 20 may be positioned between the yarn washer 50 and the yarn guide system 80, and a second wax distributor may be positioned between the feed grid and the yarn washer 50.

The advantages that can be achieved by the paraffin dispensing device according to the invention are therefore evident.

First of all, the paraffin distribution device according to the present invention allows to distribute the paraffin evenly and constantly over time. Furthermore, with the paraffin distribution device according to the invention, this means that more paraffin deposits can be obtained in terms of its reduced friction coefficient and very low coefficient of variance over the entire length of the yarn.

Practice has shown that the position of the double paraffin distributor arranged on the same side as the yarn (as shown in the figures) deposits the same amount of paraffin as the two paraffin distributors placed on opposite sides with respect to the yarn.

Therefore, in all intents and purposes, the implementation of the paraffin coating process with the device proposed by the present invention is equivalent to the implementation of a double paraffin coating with a "single" paraffin distributor, the double pass in which does not have the drawbacks in terms of double winding times, double stress phenomena on the yarn and double wear phenomena on the yarn itself, because the yarn surfaces inevitably rub against each other in the steps of unwinding and rewinding on a reel.

Furthermore, in addition to being able to deposit more paraffin than a single paraffin dispenser, it has been found that paraffin dispensing can be carried out with less material waste by using the apparatus of the present invention. In fact, it is possible to work with lower pressures on the paraffin (by adjusting the interference between the yarn and the paraffin), and therefore it is possible to reduce the effects of abrasion and erosion of the yarn on the surface of the paraffin.

Due to the reduced waste of material, a higher degree of cleanliness is achieved due to the presence of less paraffin waste. The generation of less paraffin shavings allows the use of less contaminated yarn cleaner and therefore more effective yarn quality control, cleaning the sensor with a lower stopping frequency.

With regard to the above described embodiments, those skilled in the art will be able to make changes and/or substitutions of the elements described to meet specific requirements without departing from the scope of the appended claims.

For example, there may be embodiments in which more than two (e.g., three) paraffin dispensing devices are included.

Claims

1. A paraffin wax dispensing apparatus for a winder unit (14), comprising a first paraffin wax dispenser (20) comprising: -a first support (202) adapted to partially house a first wax element (204) and-a first motorized device (206) adapted to rotate said first wax element (204) around a first rotation axis (X);

characterized in that it comprises a second paraffin distributor (40) comprising: -a second support (402) adapted to partially house a second wax element (404) and second motorised means (406) adapted to rotate said second wax element (404) about a second axis of rotation (Y);

the first axis of rotation (X) and the second axis of rotation (Y) are parallel to each other.

2. Paraffin distribution device according to claim 1, wherein the first support (202) comprises a substantially cylindrical element (208) internally able to house the first paraffin element (204), the substantially cylindrical element (208) being provided at one end (210) with thrust means adapted to advance the first paraffin element (204) projecting from an outlet end (212) opposite to said one end.

3. Paraffin distribution device according to claim 1 or 2, wherein the second support (402) comprises a substantially cylindrical element, the interior of which is able to house the second paraffin element (404), said substantially cylindrical element being arranged at one end with thrust means for pushing the second paraffin element (404) protruding from an outlet end opposite to this one end.

4. Paraffin dispensing device according to claim 1 or 2, characterized in that the first motorized means (206) and the second motorized means (406) comprise pulsed dc synchronous motors with step-wise electronic management.

5. Paraffin wax distribution device according to claim 1 or 2, characterized in that the first paraffin wax distributor (20) and the second paraffin wax distributor (40) are positioned so that their axes of rotation are perpendicular to the direction of extension (Z) of the yarn.

6. Paraffin wax distribution device according to claim 1 or 2, characterized in that the first paraffin wax distributor (20) overlaps the second paraffin wax distributor (40) in the direction of yarn extension.

7. Paraffin distribution device according to claim 1 or 2, characterized in that the first paraffin distributor (20) is adapted to rotate the first paraffin element (204) in the same direction as the rotation of the second paraffin element (404) adapted to be applied by the second paraffin distributor (40).

8. Paraffin distribution device according to claim 1 or 2, characterized in that the first paraffin distributor (20) is adapted to rotate the first paraffin element (204) in a direction opposite to the rotation with respect to the second paraffin element (404) adapted to be applied by the second paraffin distributor (40).

9. A winding unit, characterized in that it comprises a paraffin dispensing device (12) according to any one of the preceding claims.

10. Winding unit according to claim 9, characterized in that it comprises a feed grid and a yarn cleaner (50), the paraffin distribution device (12) being arranged between the feed grid and the yarn cleaner (50).

11. Winding unit according to claim 9, characterized in that it comprises a yarn cleaner (50) and a yarn guide (80), the paraffin distribution device being arranged between the yarn cleaner (50) and the yarn guide (80).

12. A winder, characterized in that it comprises at least one winding unit (14) according to any one of claims 9 to 11.