CN216192986U

CN216192986U - Textile assembly

Info

Publication number: CN216192986U
Application number: CN201990000851.2U
Authority: CN
Inventors: 罗萨里奥·阿森扎; 保罗·瓦瓦索里
Original assignee: Mazo Jili Machine Textile Co ltd
Current assignee: Mazo Jili Machine Textile Co ltd
Priority date: 2018-07-02
Filing date: 2019-06-28
Publication date: 2022-04-05
Anticipated expiration: 2029-06-28
Also published as: ES1270984Y; JP3233497U; IT201800006850A1; ES1270984U9; WO2020008310A1; DE212019000337U1; ES1270984U

Abstract

A textile assembly is disclosed that includes a roving frame on a textile manufacturing line having a cleaner device. In a spinning line, a travelling cleaner device (80) is coupled to a roving frame (1) provided with a plurality of nozzles (72) for suction from a rail plane (21). During the movement of the cleaner device along the rail, the suction flow from the nozzle is increased or decreased depending on the position of the cleaner device to optimize the effect of the suction flow and reduce energy consumption.

Description

Textile assembly

Technical Field

The present invention relates to the field of textile machines for converting staple fibers into yarn wound on bobbins. In particular, the object of the present invention is a roving frame for processing a fabric of fibers, usually coming from a drawing frame, and obtaining a roving wrapped in bobbins for spinning machines.

Background

During operation at the roving frame, the fabric travels from the tank to the doubling device and then toward the fins where it is wound to form bobbins. During transport at high speeds, it is inevitable that many fibers, such as shorter or broken fibers, separate from the fabric and accumulate on different planes of the roving frame.

In order to ensure that the material thus accumulated does not interfere with the operations performed by the machine, and also to ensure a clean working environment, it is necessary to remove the material in a timely manner, that is to say so as not to interfere with the work performed.

For this purpose, the roving frame is provided with cleaner devices which move continuously back and forth along the machine, blowing and sucking air in a targeted manner towards/from the area of the machine where the material accumulates.

A portion of the removed material is typically intercepted by the suction channel of the roving frame so that the material is sucked into the channel.

It is clear that such auxiliary operations require sufficient devices that cause an increase in the energy consumption of the machine, without also contributing directly to an increase in production.

SUMMERY OF THE UTILITY MODEL

It is an object of the present invention to provide a cleaner system for a frame of rovings which contributes to reducing the energy consumption while continuing to meet the above mentioned requirements.

Such an object is achieved by a cleaner system described below.

The present invention provides an assembly comprising:

-a roving frame for forming a roving for winding in a bobbin, the roving frame comprising:

A) a rail extending mainly in a longitudinal direction and provided with a rail plane;

B) a suction system comprising a suction box, a plurality of nozzles and a longitudinally extending primary air suction duct, the nozzles branching off from the primary air suction duct and facing the rail plane, wherein the nozzles are grouped into at least one first nozzle group and at least one second nozzle group, wherein the first nozzle group comprises a first plurality of nozzles and the second nozzle group comprises a second plurality of nozzles;

-a cleaner device adapted to blow an air flow towards the rail plane, the cleaner device being displaceable back and forth along the rail;

-selector means adapted to reduce the suction flow from the suction box towards a first group of the nozzles and to increase the suction flow from the suction box towards a second group of the nozzles;

wherein, along the longitudinal direction of the frame, at least one reference position or at least one reference section is defined such that when the cleaner device passes the at least one reference position or the at least one reference section, the selector device is activated directly or indirectly to increase or decrease the suction flow to one or more of the nozzle groups;

wherein the main air suction duct is provided with a suction port for the input of a suction flow and the longitudinal position of the suction port defines a respective reference position or a respective reference section;

and wherein the cleaner means directly activates the selector means by a mechanical trigger at the reference position or the reference section.

Further advantageous embodiments of the utility model are described below.

Wherein the suction port is connected upstream with a fan for suction.

Wherein the suction port is connected to a centralized frame suction system.

Wherein the suction port feeds one or more of the nozzle groups.

Wherein the primary air suction duct is provided with a single suction port.

Wherein the suction system comprises two nozzle groups.

Wherein the suction port is centrally disposed along the primary air suction duct.

Drawings

The characteristics and advantages of the cleaner system according to the utility model will emerge more clearly from the following description, given by way of indicative and non-limiting example with reference to the accompanying drawings, in which:

figure 1 shows a roving frame according to a preferred embodiment of the utility model;

fig. 2 shows a partial cross-sectional view of an upper region of the roving frame;

fig. 3 shows a roving frame and a cleaner device according to a preferred embodiment of the utility model; and

fig. 4a to 4f schematically show the arrangement sequence of the roving frame and the cleaner device according to a preferred embodiment of the utility model.

Detailed Description

With reference to the accompanying drawings, reference numeral 1 generally indicates a roving frame of a spinning line.

Usually, upstream of the roving frame 1 there is a draw frame, which produces a stretched fibre fabric fed to the roving frame; the roving frame works the fabric and produces a roving that is wound in bobbins intended to be transported to a spinning machine downstream of the roving frame for subsequent processing.

The roving frame 1 has a storage area 2, the storage area 2 being located at the rear of the machine; in the storage area, the fabric from the draw frame is stored, wrapped and held in a tank 4.

In this storage area 2 there is also placed a creel 6, the creel 6 consisting of a frame provided with rollers 8, the rollers 8 having a general extension along the longitudinal direction X, generally hexagonal in cross section and generally motorized, arranged above the tank 4.

The fabric coming out of the tank 4 is placed above the rollers 8 and is transported to the roving frame 1.

The roving frame 1 comprises a machine body 2, the machine body 2 comprising a stretching device 10, the stretching device 10 consisting of a pair of superimposed pressure cylinders having a circumferential rotation speed increasing from upstream to downstream so as to gradually stretch the fabric passing between the coupled cylinders.

In particular, the stretching device 10 comprises lower motorized cylinders, for example four, each extending along the entire frame in the longitudinal direction X. Each lower column cooperates with a plurality of individual upper idle columns, which are usually supported in pairs by pressure arms.

Preferably, the pressure arm is pneumatically pushed to ensure pressure coupling between the lower and upper cylinders.

Downstream of the stretching device 10, the machine body 2 comprises a guide rail 20 extending along the longitudinal direction, along the entire length of the frame, the guide rail 20 defining at the top an upper region of the frame and below a lower region.

The rail 20 accommodates a plurality of necks 22, the necks 22 being arranged in two longitudinal rows protruding from the rail plane 21 of the rail 20, the two longitudinal rows being arranged in different phases in the longitudinal direction.

The machine body 2 also comprises a plurality of fins 30, the fins 30 being arranged in a lower region at each neck 22, the fins 30 being supported by the track 20. The fins 30 are adapted to be rotated about respective vertical axes Z by an electric fin motor.

The machine body 2 further comprises a carriage 40 arranged in the lower region, carrying a plurality of spindles 42, each spindle 42 being arranged coaxially with a respective fin 30. Carriage 40 can be vertically translated in an alternating motion by means of a first electric carriage motor in order to form a spool.

Furthermore, by means of a second electric carriage motor, the carriage 40 can be translated horizontally for operations of removing the spool and loading the empty tube.

The spindle 42 aligned along the longitudinal direction X can also be rotated coaxially with the fins 30 by means of an electric spindle motor.

The fins 30 are also provided with pneumatic forming means adapted to generate an air flow under pressure to keep the fabric attached to the tubes inserted on the respective spindles 42 or to the spools being formed.

The fabric from the creel 6 passes through the stretching device 10 and then into the respective neck 2, the fabric passing through the neck 2 into the lower region of the frame.

Here, the fabric enters the corresponding fin 30 through the neck 22 and exits from the lower end; the carriage 40 moves in an alternating vertical motion so that the fabric is wound around a tube inserted on a mandrel and formed into a spool.

As the bobbins are formed, they are picked up and transferred, either automatically or manually, to the spinning machine for subsequent processing.

For this purpose, the carriage 40 can be moved horizontally between a position for forming the bobbin, in which the carriage 40 is located in the lower region of the frame, and a picking position, in which the carriage 40 is located outside the lower region.

Further, the machine body 2 includes a panel frame 50 and a pickup panel 60, and the pickup panel 60 is supported by the panel frame 50 directly above the stretching apparatus 10.

During the operation of the frame, it sometimes happens that the roving leaving the stretching device 10 and entering the neck 22 breaks, tending to accumulate on the rail plane 21 of the rail 20.

To prevent this accumulation from interfering with the work in progress, the roving frame 1 comprises a suction system comprising a main air suction duct 70 and a plurality of nozzles 72 for sucking the rovings.

The main air suction duct 70 extends longitudinally along the entire machine, preferably below the stretching unit 10, and from which nozzles 72 branch off, arranged longitudinally side by side, projecting on the rail plane 21.

The main air suction duct 70 carries a suction air flow, so that in the event of a roving breakage, the roving is sucked by one of the nozzles 72 and removed from the rail plane 21.

The roving frame 1 is further provided with a cleaner device 80, the cleaner device 80 being adapted to blow an air flow towards the rail plane 21 to remove accumulations of piled material (e.g. fibres and dust).

The cleaner device 80 is adapted to translate back and forth in front of the track 20 of the roving frame 1, the cleaner device 80 being supported by a frame 82 above the machine.

Preferably, the cleaner apparatus 80 includes at least one blowpipe 86, the blowpipe 86 being configured to direct the air flow toward the rail plane 21.

The combined action of the cleaner apparatus 80 and the nozzle 72 allows material deposited on or in the adjacent area of the rail plane 21 to be removed and drawn into the primary air suction duct 70.

Preferably, the cleaner device 80 comprises a blowing assembly adapted to generate an air flow and to blow the air flow towards the area of the roving frame, and a suction unit adapted to generate an air flow and to suck the air flow from the area of the roving frame.

For example, the suction assembly includes a first suction tube 82 directed toward an upper region of the frame. Further, preferably, the suction assembly comprises a second suction tube 84 directed towards the ground plane of the frame.

The blow assembly preferably includes a blow post 86, the blow post 86 extending vertically from an upper region to a lower region of the frame, one or more blow outlets 88 a-88 e branching off the blow post 86 in the upper and/or lower regions directed toward different regions of the roving frame.

The main air suction duct 70, which extends longitudinally over the entire machine, is connected upstream by a suction opening with a suction box 90, which suction box 90 is arranged in an intermediate, preferably central position between the head region and the tail region of the machine.

The suction box 90 contains or is connected upstream to a fan 92, the fan 92 being moved by an opposed electric motor to create a suction airflow which is then distributed between the nozzles 72 downstream of the primary air suction duct 70.

The cleaner system according to the utility model further comprises a selector means 100 which can be activated directly or indirectly when the cleaner device 80 is switched from a reference position P along the frame 1, which corresponds for example to the position where the suction box 90 is arranged.

The selector means 100 is adapted to reduce (preferably until it is fully closed) the suction flow from the suction box 90 towards the first nozzle group 72a of the predefined nozzles 72 and to increase (preferably until it is fully open) the suction flow from the suction box 90 towards the second nozzle group 72b of the predefined nozzles 72.

Advantageously, this allows the motor driving the fan 92 to be sized for suction from a number of nozzles smaller than the total number present on the frame, since a portion of these nozzles are excluded from suction or separated by means of a selector device.

For example, the cleaner device 80 is initially close to the rear region of the frame 1, and the selector device 100 is in a first configuration in which it allows the suction flow to flow from the suction box 90 towards the first nozzle group 72a, the first nozzle group 72a being arranged along the section in which the cleaner device 80 is located, while it closes the suction flow towards the second nozzle group 72b (fig. 4 a).

Having reached the reference position P, the cleaner device 80 activates the selector device 100 (fig. 4b), which moves into another configuration in which the suction flow is allowed from the suction box 90 to the second nozzle group 72b, the second nozzle group 72b being arranged along the section in which the cleaner device 80 is located, while the cleaner device closes the suction flow towards the first nozzle group 72a, which is no longer affected by the passage of the cleaner device 80 (fig. 4 c).

The same happens when the cleaner device 80 moves from the head towards the tail of the roving frame 1 (fig. 4d to 4 f).

According to a further embodiment, the cleaner system comprises a plurality of suction boxes arranged along the frame, each suction box being associated with a single group of nozzles or several groups of nozzles.

According to an embodiment, the cleaner system has two or more reference positions identifying respective groups of nozzles; accordingly, the selector means are adapted for switching on the suction flow towards only one of the groups of nozzles and switching off the suction flow towards the other groups.

According to a further embodiment, the selector means are adapted for opening the suction flow towards several groups of nozzles and simultaneously closing the suction flow towards at least one further group of nozzles.

According to a still further embodiment, the cleaner system provides one or more activation reference positions and one or more deactivation reference positions, whereby the cleaner device activates one or more nozzle groups (without deactivating any other nozzle group) when passing the activation reference positions and deactivates one or more nozzle groups when passing the deactivation reference positions.

According to an embodiment, the cleaner device directly activates the selector device, e.g. by a mechanical trigger at the reference position.

According to a further embodiment, the cleaner device indirectly activates the selector device, for example by means of a sensor detecting the position of the cleaner device, sends a signal to an electronic control unit or PLC or microprocessor, which signal is provided for operating the selector device.

In a still further embodiment, the cleaner device indirectly activates the selector device, for example by means of a timer, which is set such that at the instant the cleaner device passes the reference position, the cleaner device sends a signal controlling the actuation of the selector device.

According to an embodiment, instead of a local suction system, the suction mouth of the main air suction duct is connected to a centralized suction system of the machine.

According to a further embodiment, two or more main air suction ducts are provided along the track of the machine, possibly connected to respective local suction systems or to a single centralized suction system.

According to a still further embodiment, as an alternative to passing by means of a reference position, the selector device can be activated directly or indirectly to pass the reference section along the frame, for example so that the selector starts the operation for increasing or decreasing the suction flow towards one or more of the groups of nozzles in the position of the reference section and completes these operations in another position of the reference section.

Innovatively, the above-described cleaner system allows overcoming the drawbacks mentioned above with reference to the prior art, since it reduces the energy consumption associated with accessory operations (such as cleaning the guide rails, etc.).

It is clear that a person skilled in the art can make modifications to the above-described cleaner system in order to meet contingent needs, all falling within the scope of protection as defined by the appended claims.

Claims

1. A textile assembly, comprising:

-a roving frame (1), the roving frame (1) being for processing fibres to form a roving for winding in a bobbin, the roving frame comprising:

A) a rail (20), the rail (20) extending mainly in a longitudinal direction (X) and being provided with a rail plane (21);

B) a suction system comprising a suction box (90), a plurality of nozzles (72) and a longitudinally extending primary air suction duct (70), the nozzles (72) branching off from the primary air suction duct (70) and facing the rail plane (21), wherein the nozzles (72) are grouped into at least one first nozzle group (72a) and at least one second nozzle group (72b), wherein the first nozzle group (72a) comprises a first plurality of nozzles (72) and the second nozzle group (72b) comprises a second plurality of nozzles (72);

-a cleaner device (80), said cleaner device (80) being adapted to blow an air flow towards the rail plane (21), said cleaner device being displaceable back and forth along the rail (20);

-a selector device (100), said selector device (100) being adapted to reduce the suction flow from said suction box (90) towards said at least one first nozzle group (72a) and to increase the suction flow from said suction box (90) towards said at least one second nozzle group (72 b);

wherein, along the longitudinal direction of the frame, at least one reference position (P) or at least one reference section is defined such that when the cleaner device passes the at least one reference position or the at least one reference section, the selector device (100) is activated directly or indirectly to increase or decrease the suction flow to one or more of the nozzle groups;

wherein the main air suction duct (70) is provided with a suction port for the input of a suction flow and the longitudinal position of the suction port defines a respective reference position (P) or a respective reference section;

2. Textile assembly according to claim 1, wherein the suction port is connected upstream with a fan (92) for suction.

3. The textile assembly of claim 1 wherein the suction port is connected to a centralized frame suction system.

4. Textile assembly according to any one of claims 1 to 3, wherein the suction ports feed one or more of the nozzle groups (72a, 72 b).

5. A textile assembly according to any one of claims 1 to 3, wherein the primary air suction duct is provided with a single suction port.

6. Textile assembly according to claim 5, wherein the suction system comprises only two nozzle groups (72a, 72 b).

7. Textile assembly according to claim 5, wherein the suction port is arranged centrally along the main air suction duct (70).