CN106988003B

CN106988003B - Weft needle block group of multi-axial warp knitting machine suitable for producing unidirectional cloth

Info

Publication number: CN106988003B
Application number: CN201710316542.3A
Authority: CN
Inventors: 陈香伟; 谈源; 钮青; 王志强
Original assignee: Newtry Composite Co ltd
Current assignee: Newtry Composite Co ltd
Priority date: 2017-05-05
Filing date: 2017-05-05
Publication date: 2022-06-17
Anticipated expiration: 2037-05-05
Also published as: CN106988003A

Abstract

The invention discloses a weft needle block group, an A-type needle block and a B-type needle block of a multi-axial warp knitting machine suitable for producing unidirectional cloth, wherein X needles are arranged on the three needle blocks; arranging X needles with the diameter of Dmm from the center line of the needle block to two sides at equal intervals on the standard needle block; the arrangement positions of X needles on the A-shaped needle block are based on the standard needle block, and the diameter Dmm of one needle is reversely moved according to the yarn travelling direction; the B-type needle block moves the diameter Dmm of one needle according to the yarn travelling direction; the standard needle block and the A-type needle block as well as the standard needle block and the B-type needle block are respectively arranged at two sides of the weft laying area; the standard needle blocks and the B-shaped needle blocks are arranged at intervals according to the width of laid weft; the standard needle block and the A-shaped needle block are arranged at intervals according to the weft laying width after rotating 180 degrees. The invention is provided with the weft yarn needle block group consisting of three different needle blocks, which can just ensure that weft yarns are laid at equal intervals of 90 degrees, thereby ensuring the quality of unidirectional cloth.

Description

Weft needle block group of multi-axial warp knitting machine suitable for producing unidirectional cloth

Technical Field

The invention relates to a weft needle block group of a multi-axial warp knitting machine suitable for producing unidirectional cloth.

Background

The reinforced fiber unidirectional cloth, such as carbon fiber unidirectional cloth, is widely used in industry due to its superior performance, especially in wind power generation blades. Unidirectional fabrics can theoretically be woven using a multi-axial warp knitting machine or a biaxial warp knitting machine. If the double-shaft warp knitting machine is used for production, but the cutting speed of the double-shaft warp knitting machine is different from the conveying speed of a weft needle block, the cloth edge is stressed greatly after cutting, a wavy edge is generated, commonly called as a lug edge, and the quality of unidirectional cloth is influenced, so that the common double-shaft warp knitting machine is only suitable for manufacturing unidirectional cloth with small breadth, or the double-shaft warp knitting machine is improved, but the double-shaft warp knitting machine has the characteristics, the improvement cost is very high, and great waste can be caused. The selvedges of a cutting area are not stressed by a multi-axial warp knitting machine, so no lug edge appears, but considering the cost and the difficulty of weft laying, the weft laying process is that roving is used for weft laying in the past: the weft laying trolley is suspended in the air, weft yarns are hung down to enter the weft laying device, the weft laying device moves left and right to hang the yarns on weft needles, the weft needles and the yarn guide needles are not changed generally, and the needle pitch on the weft laying device is adjusted when different fabrics are made, so that the needle pitches of the weft laying device and the weft needles are inconsistent, uneven yarn skipping phenomenon can occur, if the yarns are thick yarns, the space between the weft yarns can suddenly become very large, and the requirement for the quality of products which is improved day by day can not be met. The current solution is to change the spun yarn to spread, so that even if the yarn is jumped, the space is not large, and the image of the product quality is not large. However, the cost of spun yarn is greatly increased, the spun yarn is easy to be terminated, the quality of products is reduced, and the production efficiency is low. Particularly, as the wind power generation blades are larger and larger, the quality requirement on the fabric is higher and higher, and as long as the phenomenon of uneven yarn distribution occurs, the surface of the fabric is uneven.

Disclosure of Invention

The invention aims to provide a weft needle block group of a multi-axial warp knitting machine suitable for producing unidirectional cloth.

The technical scheme for realizing the aim of the invention is that the weft yarn needle block group of the multi-axial warp knitting machine is suitable for producing unidirectional cloth, the weft yarn needle block group comprises a standard needle block, an A-type needle block and a B-type needle block which are consistent in width, and X needles are arranged on the three needle blocks; the standard needle block is provided with X needles with the diameter of Dmm from the center line of the needle block to two sides at equal intervals; the arrangement positions of X needles on the A-shaped needle block are based on a standard needle block, and each needle reversely moves the diameter Dmm of one needle according to the yarn travelling direction; the arrangement positions of X needles on the B-shaped needle block are based on a standard needle block, and each needle moves by the diameter Dmm of one needle according to the yarn travelling direction; the standard needle block and the A-type needle block as well as the standard needle block and the B-type needle block are respectively arranged at two sides of the weft laying area; the standard needle blocks and the B-shaped needle blocks are arranged at intervals according to the weft laying width; the standard type needle block and the A type needle block are arranged at intervals according to the width of laid weft after rotating 180 degrees; the same needle block is arranged in each weft yarn laying width.

The width of the three needle blocks is Wmm, X needles with the diameter of Dmm are arranged on the three needle blocks, and W/X is a finite decimal

D＜(W-4W/X)/2。

And the distance between two adjacent needles of the three needle blocks, namely the standard needle block, the A-type needle block and the B-type needle block is Ymm, and Y is W/X.

The width of the three needle blocks, namely the standard needle block, the A-type needle block and the B-type needle block is 25.4mm, and 5 needles with the same diameter are arranged on the needle blocks; the distance between two adjacent needles is 5.08 mm.

By adopting the technical scheme, the invention has the following beneficial effects: (1) the weft yarn needle block is arranged, the weft yarn needle block is arranged according to the structure of the weft yarn needle block, when a weft yarn trolley is used for laying weft yarns, the weft yarns can enter and exit under the width of the weft laying width, the weft yarns can be exactly laid at an equal interval of 90 degrees, and therefore the quality of unidirectional cloth is guaranteed.

(2) The weft needle blocks are all arranged on the conveying device, so that the weft needle blocks can move in the weft laying area, and the production is convenient.

(3) The weft needle blocks can be combined into various widths, and are very convenient.

Drawings

In order that the present disclosure may be more readily and clearly understood, reference is now made to the following detailed description of the present disclosure taken in conjunction with the accompanying drawings, in which

FIG. 1 is a schematic view of a weft needle set of the present invention.

Fig. 2 is a schematic structural diagram of a standard type needle block of the present invention.

Fig. 3 is a schematic structural view of the a-shaped needle block of the present invention.

FIG. 4 is a schematic structural diagram of a B-shaped needle block of the present invention.

Fig. 5 is a schematic diagram of weaving.

The reference numbers in the drawings are as follows:

the device comprises a standard type needle block 1, an A type needle block 2, a B type needle block 3, a conveying device 4 and a yarn guide needle block 5.

Detailed Description

(example 1)

Referring to fig. 1 to 5, a weft needle block set suitable for producing unidirectional fabric of the present embodiment includes a standard type needle block 1, an a type needle block 2 and a B type needle block 3, all of which are 25.4mm (1 inch) wide, and 5 needles with a diameter of D are disposed on the three needle blocks; 5 needles with the diameter of D are equidistantly arranged from the center line of the needle block to two sides on the standard needle block 1, the needle pitch is 5.08mm, and the distance between two needles at two ends is 25.4- (5.08 multiplied by 4) -5D ] mm from the edge of the needle block; the arrangement positions of 5 needles on the A-shaped needle block 2 are based on the standard needle block 1, and the diameter D of one needle is reversely moved according to the yarn travelling direction; the arrangement positions of 5 needles on the B-shaped needle block 3 are based on the standard needle block 1, and the diameter D of one needle is moved according to the yarn travelling direction; as shown in fig. 1 and 5, a standard type needle block 1 and an A type needle block 2, and a standard type needle block 1 and a B type needle block 3 are respectively arranged at two sides of a weft laying area; the standard needle block 1 and the B-shaped needle block 3 are arranged at intervals according to the width of laid weft; the standard needle block 1 and the A-shaped needle block 2 are arranged at intervals according to the weft width after rotating 180 degrees. The same needle block is arranged in each weft laying width, for example, the weft laying width is set to be 10 inches, namely 254mm, 10 standard needle blocks 1 and 10B type needle blocks 3 are oppositely arranged on two sides of a weft laying area in one weft laying width, 10A type needle blocks 2 and 10 standard needle blocks 1 are oppositely arranged on two sides of the weft laying area in the next weft laying width, and only two needle blocks are arranged at intervals by taking the weft laying width as a unit on the same side of the weft laying area. As shown in fig. 1, the guide needle block 5 is provided corresponding to the standard type needle block 1, the a type needle block 2, and the B type needle block 3, and the needle pitch of the guide needle block 5 is the same as the needle pitch of the three needle blocks. The standard type needle block 1, the A type needle block 2, the B type needle block 3 and the yarn guide needle block 5 are all detachably arranged on the conveying device 4, and the conveying device 4 can adopt a chain.

The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A weft needle block group of a multi-axial warp knitting machine suitable for producing unidirectional cloth is characterized in that:

the weft yarn needle block group comprises a standard type needle block (1), an A type needle block (2) and a B type needle block (3) which are consistent in width, and X needles are arranged on the three needle blocks;

the standard needle block (1) is provided with X needles with the diameter of Dmm from the center line of the needle block to two sides at equal intervals; the arrangement positions of X needles on the A-shaped needle block (2) are based on the standard needle block (1), and each needle reversely moves the diameter Dmm of one needle according to the yarn travelling direction; the arrangement positions of X needles on the B-shaped needle block (3) are based on the standard needle block (1), and each needle moves the diameter Dmm of one needle according to the yarn travelling direction; the standard needle block (1), the A-type needle block (2) and the standard needle block (1) and the B-type needle block (3) are respectively arranged on two sides of the weft laying area; the standard needle block (1) and the B-shaped needle block (3) are arranged at intervals according to the weft laying width; the standard needle block (1) and the A-shaped needle block (2) are arranged at intervals according to the weft laying width after rotating 180 degrees; the same needle block is arranged in each weft yarn laying width; the width of the standard type needle block (1), the width of the A type needle block (2) and the width of the B type needle block (3) are Wmm, X needles with the diameter of Dmm are arranged on the standard type needle block, W/X is limited decimal, and D < (W-4W/X)/2.

2. A set of weft needle bars for a multi-axial warp knitting machine adapted to produce unidirectional fabrics, according to claim 1, characterized in that:

and the distance between two adjacent needles of the three needle blocks, namely the standard type needle block (1), the A type needle block (2) and the B type needle block (3), is Ymm, and Y is W/X.

3. A set of weft needle blocks for a multi-axial warp knitting machine adapted to produce unidirectional fabrics, according to claim 2, characterized in that:

the width of the three needle blocks, namely the standard type needle block (1), the A type needle block (2) and the B type needle block (3), is 25.4mm, and 5 needles with the same diameter are arranged on the needle blocks; the distance between two adjacent needles is 5.08 mm.