CN110997267A

CN110997267A - Air nozzle

Info

Publication number: CN110997267A
Application number: CN201880013262.8A
Authority: CN
Inventors: 李欣怀; 卡马鲁尔巴赫林·本哈利德; 阿斯马莱利·Bt·萨利哈丁; 塞夫瑞·本纳扎穆特; 拉维赛兰·A/L·纳达拉赞
Original assignee: Top Gloves Ltd
Current assignee: Top Gloves Ltd
Priority date: 2017-08-29
Filing date: 2018-05-22
Publication date: 2020-04-10
Also published as: MY191298A; WO2019045557A1

Abstract

The present invention provides an apparatus (10) for reducing the noise level when peeling a flexible film article from a former, comprising: a cylindrical body (5) having at least one inlet (7); a plurality of holes (6) formed on the cylindrical body (5); a plurality of tubes (2) connected to the cylindrical body (5) through the holes (6); and means for introducing compressed air in which the compressed air introduced from the inlet (7) is branched off by the pipe (2) to form a laminar air flow, so that the noise level is reduced.

Description

Air nozzle

Technical Field

The present invention relates to an air nozzle, and more particularly, to an air nozzle capable of reducing the level of noise generated in a production line.

Background

In the glove manufacturing industry, the mechanical arm stripper greatly improves the noise level of the glove manufacturing industry by using an open tube through which compressed air is injected to gloves. Turbulent air flow is created when the rapidly moving air flow from the open tube comes into contact with the surrounding static air. A by-product of this phenomenon is excessive noise. Due to this fast moving air flow, the glove may tear when peeled off. Thus, the quality of the manufactured glove is reduced. A typical sound pressure level at 1 meter from the nozzle may be up to 105 dB. The storage tank compressed air pressure is typically in the range of 45 to 105psi (300 to 700 kPa). The air acceleration varies from near zero velocity in the storage tank to a peak velocity at the outlet of the pipe. The flow velocity through the pipe can become sonic, i.e. reach sonic velocity. This results in a large amount of wideband noise, especially with the highest values in the 2 to 4kHz band.

The high velocity air interacts with the surrounding medium, creating fluctuating pressures caused by turbulence and shear stresses. This can result in noise from the air jet. Due to the complexity of the radiation source, high and low frequency noise bands are formed; high frequency noise is generated near the outlet pipe in the mixing zone, while low frequency noise is generated downstream of the large scale turbulence. Thus, the spectral signature of the gas jet noise is typically broadband. Exposure to high levels of noise can result in permanent hearing loss. Neither surgery nor hearing aids help to correct this hearing loss. Short exposure to loud noise can also lead to temporary hearing changes, for example the ear may feel jammed or tinnitus. These short term problems may disappear within minutes or hours after leaving the noisy area. However, repeated exposure to loud noise can lead to permanent tinnitus and/or hearing loss. Loud noises can also cause physical and psychological stress, reduce productivity, communication and concentration disturbances, and can cause workplace accidents or injuries if one has difficulty hearing warning signals from the work environment.

The National Institute for Occupational Safety and Health (NIOSH) recommends that if the noise is exposed for 8 hours, the noise level be controlled below 85 db to minimize the loss of hearing due to occupational noise. Hearing Protection Devices (HPDs), such as earmuffs and earplugs, help to reduce noise levels to some extent, but they are not ideal options for controlling noise exposure.

Accordingly, the present invention provides an air jet nozzle that reduces the noise level when a flexible film article is peeled from a former.

Disclosure of Invention

The present invention provides an apparatus capable of reducing the noise level when peeling a flexible film product from a former, comprising: a cylindrical body having at least one inlet, a plurality of apertures formed in the cylindrical body; a plurality of tubes connected to the cylinder by a plurality of apertures; and, an apparatus for introducing compressed air into an article, wherein the compressed air introduced through the inlet is diverted via a duct to form a laminar air flow, thereby reducing noise levels.

Preferably, the device further comprises a connector to lock the position of the tube on the cylindrical body.

Preferably, the holes formed in the cylindrical body are linear and equally spaced.

Preferably, the angle of the introduced air may be adjusted by the connector.

Preferably, the tube is made of plastic, polyurethane, rubber or any other suitable material.

Preferably, the flexible film article is a glove or condom.

Drawings

These and other features, aspects, and advantages of the present invention will become better understood when the following detailed description is read with reference to the accompanying drawings in which like characters represent like parts throughout the drawings, wherein:

FIG. 1 shows a side view of a finger nozzle of the present invention.

Figure 2 shows a top view of a finger nozzle of the present invention.

Figures 3a and 3b show the finger nozzle of the present invention positioned adjacent the former.

Detailed Description

The flexible film article may be a glove or condom or any other flexible film material formed on a former. In an exemplary embodiment, the present invention is explained in terms of glove manufacturing. The present invention is not limited to glove manufacturing processes.

In the manufacturing process of gloves, a plurality of formers are installed at equal intervals on an endless chain, and the endless chain moves at a constant speed along a guide rail. These formers are immersed in a first immersion tank filled with coagulant material. The former then proceeds to a second dipping tank filled with latex material. The formers are dipped into a second dipping tank and then latex adheres to the surface of each former after being taken out of the second dipping tank. The latex on the surface of each former was dried and cured. As a result, a flexible film article such as a glove is produced on the surface of each former. The gloves are produced in a state of being adhered to the surfaces of the respective formers, and the gloves are peeled/peeled off from the respective formers in a process after curing the liquid adhered to the surface of each former.

During the glove peeling, the upper end portion of the glove formed on the former may be folded by the roller brush. In one embodiment, the upper end portion of the glove formed on the former can also be folded by means of a device (10), a finger nozzle. The air blown from the finger nozzles (10) or directed to the glove folds the upper end portion of the glove formed on the former. The finger nozzles (10) can be positioned in the vicinity of the path of the previous conveyor. Air is blown out from the finger nozzles (10) and the upper end portion of the glove is folded in a skirt shape. Next, the chuck jaws of the robotic debonder were closed and brought into contact with the gloves adhered to the former surface. Next, air is blown from the finger nozzles (10) and the upper folded portion of the glove is pushed up from the folded state and covers the chuck jaws. The chuck jaws pull the glove off the former and air from the finger nozzles (10) blows into the glove adhering to the former, peeling off completely without any tearing.

Referring to fig. 1 and 2, the finger nozzle (10) comprises a cylindrical body (5) having a predetermined diameter, a plurality of tubes (2) defining a hollow passage (1) and a connector (3). The cylindrical body (5) has an inlet (7) for supplying compressed air, preferably the inlet (7) is connected to a compressed air cylinder by a hose. Furthermore, a plurality of holes (6), preferably five holes spaced apart with equal spacing, are drilled in the cylindrical body (5). The holes (6) formed on the cylindrical body (5) may be in rows or columns with equal spacing between them. The tube (2) is inserted into the hole (6) and the connector (3) locks the tube (2) in place to prevent movement and misalignment of the tube (2) and thus prevent air jet angle drift.

The tube (2) of the finger nozzle (10) can preferably be made of a polyurethane material, which combines the best properties of plastics and rubber. It has abrasion and tear resistance, high tensile and elongation values, and low compression set. Polyurethanes are naturally flexible, with almost unlimited bending capabilities. The tube (2) may also be made of plastic, rubber and other suitable materials. The cylindrical body (5) may be made of stainless steel, titanium, tantalum, hastelloy, plastic or any other suitable material.

When compressed air is supplied to the cylindrical body (5) through the inlet (7), the air is branched/diverted in five directions through the tube (2). The tube (2) inserted in the hole (6) in the cylindrical body (5) provides a strong laminar air flow, so that when the compressed air comes into contact with the surrounding static air, it can manage to control the turbulent air flow and reduce the sound level produced. The tube (2) is of smaller diameter and is inserted directly into the bore (6) in the cylinder (5) via the connector (3). Furthermore, the connector (3) has a joint (4), which joint (4) supports the tube (2) to be locked in this position. The inlet (7) is positioned parallel to the emanation zone through the tube (2) with the angle of the base of the inlet body increasing. The compressed air is branched off at the same speed and in the same direction through the pipe (2). Therefore, the noise level generated when coming into contact with the outside static ambient air is low. The diameter of the tubes (2) may be in the range of 3mm to 5mm, which may help to reduce noise, as the amount of air blown out of each tube (2) is much less. The air blown out of the tube (2) creates a laminar air flow over the glove, enabling the glove to be peeled off completely and easily without tearing the glove.

The holes (6) drilled on the arc-shaped surface of the cylindrical body (5) are linear and equally spaced. The bores (6) have a smaller diameter than the inlet (7). These holes (6) are designed to insert the tube (2) into the cylindrical body (5) and to lock in this position by using the connector (3), thus preventing the tube (2) from moving, dislocating or changing the air injection angle.

Referring to fig. 3a and 3b, finger nozzles (10) for spraying air to the glove, similar to fingers, may be installed horizontally or vertically or at an inclined angle near or near the former. The cylindrical body (5) is preferably equipped with at least five or more tubes (2), said tubes (2) being preferably arranged on the cylindrical body (5) in one or two rows. The angle of the air emitted from the tube (2) can be adjusted by adjusting the connector (3). This arrangement can reduce tearing of the glove and the noise level during peeling.

The present invention may be embodied in other specific forms without departing from its essential characteristics. The described embodiments are to be considered in all respects only as illustrative and not restrictive. The scope of the invention is, therefore, indicated by the appended claims rather than by the foregoing description. All changes which come within the meaning and range of equivalency of the claims are to be embraced within their scope.

Claims

1. An apparatus (10) for reducing the noise level when peeling a flexible film article from a former, comprising:

a cylindrical body (5) having at least one inlet (7);

a plurality of holes (6) formed on the cylindrical body (5);

a plurality of tubes (2) connected to the cylinder (5) through holes (6); and the combination of (a) and (b),

the manner in which the compressed air is introduced into the article,

in which compressed air introduced through an inlet (7) is branched off through a pipe (2) to form a laminar air flow, thereby reducing the noise level.

2. The device (10) according to claim 1, further comprising a connector (3) for locking the position of the tube (2) on the cylindrical body (5).

3. The device (10) according to claim 1 or 2, wherein said holes (6) formed on said cylindrical body (5) are linear and equally spaced.

4. The device (10) according to any one of claims 1 to 3, wherein the angle of the introduced air is adjustable by means of a connector (3).

5. The device (10) according to any one of claims 1 to 4, wherein the tube (2) is made of plastic, polyurethane, rubber or any other suitable material.

6. A device (10) according to any of claims 1 to 5, wherein the flexible film article is a glove or a condom.