CN101203641A - Method for knitting articles with a circular knitting machine having a needle cylinder which can be actuated in rotation in two directions - Google Patents

Abstract

A method for knitting an article using a circular loom, in particular a high-fineness circular loom, having a cylinder that can be actuated and rotated in two directions. At least one region (A, B, C, D) of the article (1) is knitted with adjacent needle groups by reducing the number of active needles in the needle groups by at least one times, the reduction being achieved by transferring the last knitted stitch formed by a specific needle of the needle group to an adjacent needle of the needle group, so that during at least a portion of the subsequent course knitted by the needle that remains active, the specific needle no longer knits, while the region (A, B, C, D) of the article is obtained by alternating successive courses knitted by actuating the needle cylinder in one direction about its axis and partial courses knitted by actuating the needle cylinder in the opposite direction.

Description

Method of knitting articles using a circular loom with cylinders capable of actuating rotation in two directions

technical field

The present invention relates to a method of weaving articles using a circular knitting machine, especially a high fineness, high gauge circular knitting machine, with cylinders that can be actuated to rotate in two directions.

Machines are known for knitting hosiery or other articles which feed a loop from one needle which forms the loop onto an adjacent needle. A machine of this type is eg disclosed in WO-02/070799.

Background technique

Until now, the technique of conveying knitted loops has been mainly used to obtain open-hole products. An example of an application for through-hole technology is given by the same applicant in WO2005/080653.

Also known are methods for weaving shaped products with circular looms, which are based on increasing the number of movable needles within a certain product range. This technique has the drawback of allowing only the raising of the active needles, and therefore requires that these areas of the product must be knitted starting from the side knitted with the greatest number of needles. This fact limits the possible weaving processes and the possible shapes obtained by this technique.

Circular looms are also known which are provided with needle cylinders which can be actuated for a rotational movement about their axis in two rotational directions. With the possibility of being able to actuate the cylinder in two directions of rotation, this machine can produce, for example, the shoulder strap area of undershirts, bodysuits or similar garments, or the crotch area of underwear, bodysuits or similar garments, which Regions have finished edges and do not require cutting and/or finishing operations.

Even with the aforementioned machines, it is not always possible to produce products that do not require cutting and/or finishing operations, since only the number of moving needles can be increased during weaving. For example, in a product, there must be a knitting area with a gradually increasing number of stitches and a knitting area with a gradually decreasing number of stitches, usually after the product is produced on the machine, the final area is obtained by cutting to obtain the desired shape.

Contents of the invention

The object of the present invention is to provide a method of weaving articles with a circular loom, especially a high-definition circular loom, which has cylinders that can be actuated in both Which side the article begins to weave enables the production of articles with shaped regions that do not require cutting or finishing operations.

Within the scope of this aim, the object of the present invention is to provide a method that makes it possible to produce products with shaped areas that do not require cutting or finishing operations and that also reduces the yarn consumption of the products.

Another object of the present invention is to provide a circular loom for producing products having shaped regions, preferably with high fineness needles from approximately 16-50 needles/inch.

Said objects, as well as the others mentioned above, which will become clear hereinafter, are obtained by a method of knitting knitwear with a circular loom, especially a high-fineness circular loom, which has A cylinder capable of actuating rotation, characterized in that at least one zone of said article is knitted with adjacent groups of needles by reducing the number of active needles in said group by at least one-fold, reducing the number of needles This is achieved by feeding the last knitting stitch formed by a particular needle in said group to adjacent needles in said group so that at least During a portion of the period, the particular needle is no longer knitting while the area of the article is a continuous course knitted by rotating the cylinder about its axis in one direction and rotating it around its axis by actuating the cylinder in the opposite direction. Axial rotary knitting is obtained by alternating partial courses of stitches.

Description of drawings

Further features and advantages of the invention will become apparent from a preferred but not exclusive method embodiment of the invention, which is illustrated in a non-limiting manner in the accompanying drawings, in which

Figure 1 is a schematic diagram of an article such as a bodysuit obtained by the method of the present invention;

Figure 2 is an enlarged view of the product details in Figure 1;

Figure 3 is an enlarged view of another detail of the product in Figure 1;

Figure 4 is an enlarged view of another detail of the product in Figure 1;

Figure 5 is a cross-sectional view of a prior art adjustable cam device wherein loops are released from one needle and fed to an adjacent needle;

FIG. 6 is a schematic top view of adjacent hooks and sinkers, showing the process of generating a coil pattern corresponding to the position of the cam in FIG. 5 .

Detailed ways

With reference to the accompanying drawings, the method of the present invention will be accomplished on a circular loom, preferably having a fineness or gauge of about 16 to 50 needles per inch, equipped with cylinders that go around The shaft itself can be driven in two directions of rotation, for example of the type disclosed by the same applicant in WO2004/097092, while the barrel is equipped with a needle and/or other elements for turning the needle made of a needle The knitting loops formed are delivered to adjacent needles fitted laterally on one side or the other of this needle, which must release the knitting loops, as disclosed for example in Italian patent application MI2004A-001146 by the same applicant .

The method comprises producing an article or at least one region A, B, C, D of a product 1 by means of a group of adjacent needles, by moving said needles together during formation of at least a part of a subsequent course. The final knitting loop formed by a certain number of needles is delivered to the adjacent needles in the group of needles, which can reduce the active knitting needles in the group of knitting needles by at least one time. Continuous course portions are created by actuating the needle cylinder about its axis of rotation in one direction, which alternate with portions of courses created by actuating the needle cylinder about its axis of rotation in the opposite direction, thereby Areas A, B, C, D that form product 1.

Preferably, the knitting of the areas A, B, C, D of the knitted product 1 is reduced by feeding the final knitting loops formed by some of the needles located at least one end of the knitting needle group to the adjacent needles of said knitting needle group. The number of active knitting needles in the needle group.

The method of the invention will now be described with reference to the accompanying drawings, it being understood that the embodiment for the production of eg bodysuits or similar products can also be used for the production of other products.

The product in Figure 1 is woven from the low side, ie from the crotch of the bodysuit.

Initially, the needles belonging to two adjacent groups of knitting needles arranged in the two sectors of the cylinder are used for knitting to form the zones E, F of the product, which constitute the front and rear zones of the lower part of the bodysuit, two of which The sectors are angularly spaced from each other about the axis of the barrel.

The number of needles used for knitting in the two sets of needles is gradually increased in order to obtain the front region E and the rear region F of gradually increasing width. The number of knitting needles used for knitting in the two sets of needles is increased in a manner known per se, for example by means of a needle selection device usually equipped with modern circular looms.

Preferably, zones E and F are knitted by actuating the cylinders in alternating rotation about their axis, by actuating the cylinders in one direction of rotation, and causing the needles in both sets of needles to be on one or the other of the machine. Multiple individual feeding or doffing knitting, forming continuous courses of zones E, F; by actuating the needle cylinders in opposite directions of rotation, and making the needles of the two sets of needles respectively on the same feeding yarn of the machine or doff knitting to form other course portions of zones E and F which alternate with the above-mentioned continuous courses. After the last needles have moved to the knitting position of the two sets of needles past the already knitted feeding or doffing position, the needle cylinders are reversed and the yarn forms the assigned zones E and/or F at the feeding or doffing position.

In this way, the ends of the areas E, F do not require cutting and/or finishing operations after the product has been removed from the machine.

The weave detail near one end of area F is shown in FIG. 4 .

Subsequently, the tubular portion G of the product 1 knits in a known manner by actuating the cylinders about their axes for continuous rotation and substantially causing all the needles of the cylinders to knit in one or more feeding or doffing positions of the machine. made. During this step, some needles of the cylinder may not be knitted to obtain a special pattern effect or shape in this knitted area of the product.

Furthermore, the cup regions H, I of the bodice bra part can be provided in a known manner during the production of the part G.

After the production of part G, the areas A, B, C, D as product additions constitute the shoulder straps of the bodysuit to be produced.

According to the invention, any one of the zones A, B, C, D is produced with groups of continuous needles by gradually reducing the number of active needles in such groups. Reduction of moving needles by transferring the final knitting loop formed by some of the needles of a group to adjacent needles of the same group, so that it is no longer a knitting needle which is knitted by the moving needles for the subsequent The knitting stitch has been stopped or transferred during the course.

Successive course sections are created by actuating the cylinder about its axis of rotation in one direction and the other course section is produced by actuating the cylinder about its axis of rotation in the opposite direction, the two sections alternating, and Areas A, B, C, D that form product 1.

Figure 2 is an enlarged view of a detail of area C near the side of the product (left in Figure 1), and Figure 3 is an enlarged view of a detail of area C near the opposite side (right in Figure 1).

In Figures 2 and 3, the representation of area C is, for the sake of simplicity, limited to eight needle knitting, the courses of which are indicated by reference numerals 1-6 in Figure 2 and 11-16 in Figure 3 . The knitting process of zone C is knitting from the bottom up in Figs. 2 and 3 .

With reference to Figure 2, the reduction of moving needles is achieved by feeding the stitches in a known manner such as that provided by WO-02/070799 (see Figures 5 and 6), in particular before starting to form the subsequent course 22, The last knitting stitch 211 of the course formed by the knitting needles N forming the wale 1 is fed to the knitting needles N forming the wale 2 .

In this way, during the formation of a partial course 22, the needles N forming wale 1 are no longer knitting, while the needles N forming wale 2 are knitting, and the other needles N of said group of needles form a new A knitting loop 222 knits together with the two knitting loops 211 and 212 transmitted by the needle in the narrowed state.

Before starting to knit the next course 23 , the knitting stitches 222 have been stopped or conveyed from the needle N forming wale 2 to the adjacent needle N forming wale 3 .

During the formation of the course 23, the needles forming the wale 2 no longer knit, but the adjacent needles forming the wale 3 knit, and the other needles N of said needle group form a new loop 233, which and The two knitting loops 222 and 223 conveyed by the needle in the narrowed state are knitted together.

It should be noted that portions of courses 21 and 23 are created by actuating cylinder Cy to rotate in one direction about its axis, while portions of course 22 are produced in the opposite direction by actuating cylinder Cy about its axis. rotation generated.

With reference to Figure 3, the reduction in the number of moving needles is achieved by feeding the stitches in a known manner such as that provided by WO-02/070799 (see Figures 5 and 6), in particular before starting to form the subsequent course 32, The last knitting stitch 3116 of the partial course 31 formed by the knitting needle forming the wale 16 is delivered to the knitting needle N forming the wale 15 .

In this way, during the partial formation of the course 32, the needles forming the wale 16 no longer knit, but the needles N forming the wale 15 knit, and the other needles of said group of needles form a new knitting loop 3215, this loop is knitted together with the two knitting loops 3116 and 3115 transmitted by the needle in the narrowed state.

Before starting to knit the next course 33 , the knitting stitches 3215 have stopped or been delivered from the needle N forming the wale 15 to the adjacent needle N forming the wale 14 .

During the formation of the course 33, the needles forming the wale 15 no longer knit, while the adjacent needles forming the wale 14 knit, and the other needles of said group of needles form a new stitch 3314, which is the same as the already existing stitch. The two knitting loops 3215 and 3214 transmitted by the needle in the narrowing state are knitted together.

It should be noted that portions of courses 31 and 33 are created by actuating cylinder Cy to rotate about its axis in one direction, while portions of course 32 are rotated in the opposite direction by actuating cylinder Cy about its axis produce.

The knitting of zone C is carried out by actuating the needle cylinders in alternating rotation about their axes and, depending on the shape of the zone, reducing the active needles of the group of needles forming zone C, if necessary.

Regions A, B and D are produced in a similar manner as region C was formed.

The knitting needles that are no longer knitting remain retracted in the needle cylinder, and below the narrowing plane formed by the sinker, so as not to interfere with other knitting needles and other elements of the circular loom in the working state.

By weaving in the manner described above, zones A, B, C, D can be obtained with gradually reduced widths, and the edges of these zones do not require further finishing.

For simplicity of description, in the embodiment described above with reference to Figures 2 and 3, it was assumed that the number of active needles in the needle group providing zone C was reduced before any course started. In practice, the number of active needles used to produce the zones A, B, C, D is reduced every other row or in successive rows, depending on the shape to be obtained by said zones. Furthermore, if a shape is to be obtained with at least one width reduction alternating with an increase in the area width, the number of needles used for weaving in a needle group can be reduced in a known manner in a knitting process, whereas in It can be added in other weaving techniques.

At the end of knitting in zones A, B, C, D, the product is released by the needles and removed from the machine. Alternatively, for example according to the method disclosed in the Italian patent application MI2004A-002495 filed by the same applicant, on the same circular loom it is possible to join two regions constituting the same shoulder strap or crotch, so that on the circular loom weaving the product Straight through said product.

Although reference is made to the production of profiled areas of bodysuits, the method of the invention can be used to obtain profiled areas of other products, such as underwear, singlets, tops or similar products.

It should be noted that by means of the method of the present invention, the product 1 can be produced by weaving from the upper end. In this case, the zones A, B, C, D can be produced in a known manner, namely by gradually increasing the needles of the needle groups producing said zones, and alternatively, according to the invention by gradually reducing the production In the manner of the knitting needles of the two groups of knitting needles of zones E and F, the reduction of knitting needles is carried out by transferring the last knitting loop formed by the knitting needles which are not subsequently knitting to the adjacent knitting needles.

It has in fact been found that the method of the present invention fully achieves the intended purpose due to the method of reducing the number of moving needles by feeding the knitting loops of one needle to the adjacent needle and actuating the needle cylinder about its axis. The two-way rotation is combined to produce products, even products with a high fineness, regardless of which side of the product weaves from, with shaped areas that do not require cutting and finishing operations.

The method described is susceptible to numerous variations and modifications, all of which are within the scope of the claims; all details may otherwise be replaced by equivalent elements.

In fact, the material used and the shape can be any material required by the present invention and known in the prior art.

Published Italian Patent Application No. MI2005A001190 claiming priority is incorporated by reference in its entirety.

Where the technical features mentioned in any claim are described with reference signs, all reference signs are to improve the understanding of the claims, therefore, such reference signs are used for any reference signs denoted by such reference signs in the embodiments. An element is not limiting.

Claims (3)

1. A method for weaving articles with a circular loom, especially a high-fineness circular loom, which has a needle cylinder that can actuate rotation in two directions, characterized in that: the product (1) At least one zone (A, B, C, D) is knitted with adjacent groups of needles by at least doubling the number of active needles in said groups of needles by placing said The last knitting stitch formed by a particular needle in the needle group is delivered to adjacent needles in said needle group such that during the knitting of at least a part of a subsequent course by the needles which remain in motion, said particular needle does not Reknit, while the regions (A, B, C, D) of the article are woven successive courses by rotating the cylinder about its axis in one direction and by actuating the cylinder in the opposite direction about its axis The partial courses of rotary knitting are obtained alternately. 2. A method according to claim 1, characterized in that the reduction of the movable needles of said needle group is formed by placing a specific needle of said needle group at at least one end of said needle group Finally, the knitting loop is delivered to the adjacent knitting needles in the group of knitting needles to complete. 3. A method as claimed in claims 1 and 2, characterized in that it is carried out on a circular loom having a fineness of approximately 16-50 needles/inch.

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