Double-needle sewing assembly of lockstitch sewing machine
By designing the double-needle sewing assembly of the flat sewing machine, the problem of sewing parallel double sewing threads in clothing production is solved, and high-quality sewing and efficient workflow are achieved.
Patent Information
- Application Number
- CN202323541601.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-25
- Publication Date
- 2025-03-11
- Estimated Expiration
- 2033-12-25
AI Technical Summary
In clothing production, it is difficult to effectively sew double sewing threads arranged in parallel with ordinary sewing machines, resulting in waste of labor and sewing quality problems.
A double-needle sewing assembly of a flat-sewing machine is designed, including a needle plate with a double-needle needle of a flat-sewing machine and a waist-round needle hole. The distance between the axes of the two needles is 1-2.5mm, and a needle handle is shared, and it is connected by soldering.
The double sewing threads are neat and symmetrical on the front of the fabric, and the distance between the two sewing threads is adjustable, improving product quality and work efficiency.
Smart Images
Figure CN222594283U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a sewing machine, in particular to a double-needle sewing assembly for a flat-sewing machine. Background Art
[0002] In garment production, we often encounter the process requirement of parallel double-line arrangement (the two lines are parallel and close to each other); the normal practice is to sew twice with a sewing machine, which not only wastes work time but also causes quality problems due to inaccurate sewing stitches (the two lines cannot remain parallel and may even cross each other). Utility Model Content
[0003] The purpose of the utility model is to overcome the shortcomings of the above-mentioned background technology and provide a double-needle sewing assembly for a flat-bed sewing machine, which can effectively sew double sewing threads arranged in parallel and has the characteristics of high sewing quality and high working efficiency.
[0004] The technical solution provided by the utility model is: a double-needle sewing component of a flat-bed sewing machine, comprising a flat-bed sewing machine needle and a flat-bed sewing machine needle plate cooperating with the flat-bed sewing machine needle; the characteristics are: the flat-bed sewing machine needle is a double-needle flat-bed sewing machine needle, that is, two needles arranged in parallel and with the needle tails connected as one; the needle hole on the flat-bed sewing machine needle plate is a waist-round needle hole, and the long axis direction of the waist-round needle hole is parallel to the movement direction of the cloth during sewing.
[0005] The two machine needles share a needle handle and are connected as a whole by soldering.
[0006] The distance between the axes of the two needles is 1-2.5 mm and the needle tips are at the same height.
[0007] The working principle of the utility model is: since the distance between the two needles is 1-1.5mm, and the same needle hole on the needle plate is used; when working, each time the needle bar of the lockstitch sewing machine moves up and down once, the surface threads carried by the two needles fixed on the needle bar respectively cooperate with the bottom thread in the shuttle core once at the same time; since the distance between the two needles is constant, after the lockstitch sewing machine continuously sews, two parallel surface thread traces appear on the front side of the fabric, and a single bottom thread trace appears on the back side of the fabric.
[0008] The beneficial effects of the utility model are as follows: due to the adoption of the double-needle sewing assembly of the flat-sewing machine, not only the double sewing thread stitches sewn on the front side of the cloth are ensured to be arranged neatly and evenly, and the distance between the two sewing thread stitches is adjustable, the product quality is improved, and the sewing can be successful in one time, and the work efficiency is also doubled. BRIEF DESCRIPTION OF THE DRAWINGS
[0009] Figure 1 It is a schematic diagram of the main structure of the double needles of the lockstitch sewing machine in the embodiment of the utility model.
[0010] Figure 2 It is a schematic diagram of the main structure of the needle plate of the lockstitch sewing machine in the embodiment of the utility model.
[0011] Figure 3 It is a left-side structural schematic diagram of a needle plate of a lockstitch sewing machine in an embodiment of the utility model.
[0012] Figure 4 This is a comparison chart of sewing stitch effects before and after improvement.
[0013] Numbers in the figure: double needles of flat-bed sewing machine 1, needle bar 1-1, needle handle 1-2, spot welding 1-3, flat-bed sewing machine needle plate 2, waist needle hole 2-1, needle plate fixing hole 2-2, fabric 3, qualified stitch A, unqualified stitch B. DETAILED DESCRIPTION
[0014] The following is a further description with reference to the embodiments shown in the accompanying drawings.
[0015] Figure 4 In the process, the sewing stitch required by the process is shown as A; however, in actual operation, the sewing stitch obtained by sewing twice with a sewing machine is as shown in B: the two lines cannot remain parallel and even cross each other.
[0016] To solve the above problems, the utility model provides a double-needle sewing assembly for a flat-bed sewing machine, comprising a flat-bed sewing machine needle with a needle handle fixed on a flat-bed sewing machine needle rod and a flat-bed sewing machine needle plate 2 fixed on a flat-bed sewing machine table and cooperating with the flat-bed sewing machine needle; the above structure is similar to the existing flat-bed sewing assembly for a flat-bed sewing machine.
[0017] The improvements of the utility model are as follows: first, a single-needle flat-bed sewing machine needle is changed into a double-needle flat-bed sewing machine needle 1, that is, the needle bars 1-1 (needle bar diameter is 1mm) of the two needles are arranged in parallel and the distance between the two needle axes is 1-2.5mm (when the outer walls of the two needles are fitted together, the distance between the two needle axes is 1mm); in addition, when installed on the needle bar of the flat-bed sewing machine, the needle tips of the two needles are at the same height; the needle tails of the two needles are connected as a whole and fixed on the same needle handle 1-2; second, the round needle hole on the needle plate of the flat-bed sewing machine is changed into a waist-round needle hole, the long axis direction of the waist-round needle hole is parallel to the movement direction of the fabric during sewing, and is larger than the outer contour of the two needles (at least larger than the distance between the two needle axes plus the diameter of the two needles); to avoid interference with the up and down movement of the needles during operation.
[0018] When making a double needle for a flat-bed sewing machine, take two flat-bed sewing machine needles, cut off one of the flat-bed sewing machine needles from the needle handle, and place it side by side with the needle hole of the other uncut flat-bed sewing machine needle; with the cut needle in front (the uncut needle in the back), the needle tips at the same height, and spot weld (solder) them together from the remaining needle handle.
[0019] When making a lockstitch machine needle plate, use a 2MM drill bit to drill a parallel hole on a regular lockstitch machine needle plate according to the previous parallel needle distance, and then drill through the two holes to form a waist-round hole.
[0020] Sewing operation method;
[0021] First, replace the conventional needle plate of the flat-bed sewing machine with the improved needle plate; then install the double needles of the flat-bed sewing machine on the needle bar of the flat-bed sewing machine in the normal way (note during installation: the axes of the two needles need to be staggered by 0-0.5mm in the direction of movement of the fabric), then insert a needle thread into the needle holes of the two needles respectively, then lift the presser foot and put in the fabric 3, and finally operate according to the normal operation; the two needles can work at the same time and form two parallel stitches on the fabric (such as Figure 4 The qualified stitch A in the stitching); the distance between the two stitches is zero to 1.5mm. In other words, the two stitches can overlap (for thin fabrics, overlapping double stitches can be used instead of thick stitches to prevent needle holes from being pierced in the fabric), or they can be placed side by side at a close distance. This only requires adjusting the angle between the line connecting the two needle axes and the direction of fabric movement when the double needles of the flat-bed sewing machine are installed on the needle bar of the flat-bed sewing machine.
Claims
1. A double-needle sewing assembly for a flat-bed sewing machine, comprising a flat-bed sewing machine needle and a flat-bed sewing machine needle plate (2) cooperating with the flat-bed sewing machine needle; characterized in that: The flat-bed sewing machine needle is a double flat-bed sewing machine needle (1), that is, two needles arranged in parallel and with the needle tails connected as one, so that the distance between the two stitches to be sewn can be adjusted; the needle hole on the needle plate of the flat-bed sewing machine is a waist-shaped needle hole (2-1), and the long axis direction of the waist-shaped needle hole is parallel to the movement direction of the fabric during sewing; The two needles share a needle handle and are connected as a whole by soldering; The structure of the double needle of the flat-bed sewing machine is two flat-bed sewing machine needles with needle holes arranged in parallel, one of the flat-bed sewing machine needles is cut off at the needle handle and then connected to the other flat-bed sewing machine needle by soldering, and the soldering position is the needle handle of the two flat-bed sewing machine needles; The distance between the axes of the two needles is 1-2.5 mm and the needle tips are at the same height; After continuous sewing by the flat-bed sewing machine, two parallel upper thread stitches appear on the front of the fabric, and a single lower thread stitch appears on the back of the fabric.