EP0997566A2 - Latch needle for machines for making knitwear - Google Patents

Abstract

The latch needle (10) is for machines for the production of knitted fabrics. The fabrics are especially for interior linings in cars. It has a needle shank (12), a needle butt (14), a needle head (16) and a needle latch (18). The needle features several projections (20) on the underside of the needle shank. These projections are separated from each other by hollow spaces or dents and some or all of their ends (24) directed upwards towards the latch are bevelled.

Description

The invention relates to a latch needle for machines for Manufacture of knitted fabrics, in particular interior linings of motor vehicles, with a needle shaft, at least a needle foot, a needle head and a needle tongue, wherein several protrusions on the underside of the needle shaft are provided through cavities or recesses are spaced from each other. Such needles are in the prior art in different versions known.

As is well known, the construction of these projections was known rectangular and served to give the latch a certain Provide stability in the needle bed.

To reduce friction and wear, use different techniques oil on the in the cylinder itself brought up and down moving needle, e.g. With fully electronic oilers that each oil point with separate control small pumps. Shoot those little pumps again and again oil drops in a defined quantity and defined Intervals so that the needle is in its guide cylinder smoothly glides or swims over time. Through the ever faster drive speeds at the Machines for the manufacture of knitted fabrics, in particular for Circular knitting machines move through the small oil pumps injected oil very high up during operation, until it finally gets into the fabric to be made. For example, the headlining, the footrest or the to produce A, B, or C pillar and there one more or causes less oil streak.

The invention is therefore based on the object tongue needle for manufacturing machines of knitwear to be improved in such a way that they are serious Disadvantage eliminated, i.e. a latch needle for Provides the oil streak on the manufactured Knitwear completely or at least largely prevented.

According to the invention this object is achieved in that some or all of them on her up to the needle tongue directed end are chamfered.

If the needle according to the invention is now from top to bottom is moved at considerable speed, that is in the Cavities or recesses no longer like oil previously driven up to the knitwear, but chooses the path of lower resistance down there the beveled end represents less resistance than that previously existing 90 ° edge.

Further advantages and features emerge from the subclaims which also shares with the main claim of may be meaning according to the invention.

In the following, a preferred embodiment for better understanding of the invention with reference to the drawing explained in more detail.

Fig. 1

eine schematische Querschnittsansicht der erfindungsgemäßen Zungennadel; und

Fig. 2

eine schematische Ausschnittsdarstellung, wie diese erfindungsgemäße Nadel in einer Rundstrickmaschine angeordnet ist und mittels Ölpumpen besprüht wird.

It shows:

Fig. 1

a schematic cross-sectional view of the latch needle according to the invention; and

Fig. 2

is a schematic sectional view of how this needle according to the invention is arranged in a circular knitting machine and is sprayed by means of oil pumps.

1 and 2 is the latch needle according to the invention generally designated 10. In Fig. 1 is the invention Tongue needle 10 shown in isolation while in Fig. 2 mirror image in a cutout Circular knitting machine 21 is installed.

Such latch needles 10 usually have one Needle shaft 12, at least one needle foot 14, one Needle head 16 and a needle tongue 18. In the present case are two needle feet 14 spaced from each other intended. It is also known that several of each other spaced projections 20 on the underside of the needle shaft 12 are arranged through corresponding cavities or recesses 22 are separated from each other. in the in the present case 6 such projections 20 are provided, the needle shaft 12 and thus the latch needle 10 a certain stability even at higher speeds Rent circular knitting machine. The number of protrusions 20, however, their size and distance from each other is not critical, but can be done by the skilled worker in the usual way Frames can be varied.

Of particular importance according to the invention is, however The fact that all of the protrusions 20 are at their top are directed towards the needle tongue 18 end 24, so that to the axis of the needle shaft 12 approximately an angle of about 130 ° is formed. This geometric structure was chosen and ensures that the injected into the cavities 22 Oil, which is indicated by the arrows 25 in Fig. 2 no longer becomes a knitted fabric (not shown) is driven, but directly from the cavity 22 is led away below, so that the dirt to be produced Knitwear should be avoided from the outset.

Claims (5)

Latch needle (10) for machines for manufacturing of knitwear, in particular interior linings from Motor vehicles, with a needle shaft (12), at least a needle foot (14), a needle head (16) and one Needle tongue (18), with several projections (20) on the Underside of the needle shaft (12) are provided, which spaced from each other by cavities or recesses (22) are characterized in that some or all the end facing upwards towards the needle tongue (18) (24) are bevelled. Latch needle according to claim 1 for circular knitting machines, characterized by seven protrusions (20) that have a beveled end (24). Latch needle according to claim 1 and 2, characterized in that the projections (20) of the same structure and are evenly spaced from each other. Latch needle according to claims 1 to 3 made of flat steel. Tongue needle according to claim 1 to 4, characterized in that the angle of the bevel between the Needle shaft (12) and the beveled end (24) in the area of 120 ° and 150 °, in particular 135 °.

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