CN117328222A - Digital preparation method of high-stereoscopic embroidery - Google Patents

Abstract

The invention relates to a digital preparation method of a high-stereoscopic embroidery, which comprises the following steps: designing a pattern datum line; designing a trace unit including a plurality of traces constituting a polyline; adjusting the upper thread tension and the lower thread tension of the embroidery machine to form twisted points of the upper thread and the lower thread on the back surface of the embroidery cloth; and embroidering a plurality of stitch units on the embroidery cloth to obtain embroidery products, wherein the stitch units are sequentially arranged on the pattern reference lines. The invention can simplify the three-dimensional embroidery process, bring more exquisite three-dimensional effect for the embroidery field, and has the characteristics of low cost, high efficiency and easy popularization.

Description

Digital preparation method of high-stereoscopic embroidery

Technical Field

The invention relates to the technical field of digital embroidery, in particular to a digital preparation method of a high-stereoscopic embroidery.

Background

In recent years, digital flat embroidery technology has been popular in the embroidery field, and brings a rich and various embroidery works for people. Although some methods of stereoscopic digital embroidery are tried, they are often too complex and difficult to achieve exquisite effects, limiting their application and popularization.

The hand embroidery seedling embroidering crepe embroidering is to firstly braid 8 strands of embroidering threads, and then fix the braid with reel rotary wave type embroidering cloth. The crepe embroidery forms the unique high three-dimensional degree through the accumulation and extrusion effects of embroidery threads. Inspired by the craftwork of hand embroidery seedling embroidery craftwork, the fine knitting mechanism and the three-dimensional degree of the embroidery thread accumulation simulation craftwork are directly obtained by utilizing a digital embroidery machine, and the new direction of the digital three-dimensional embroidery method is explored.

Disclosure of Invention

The technical problem to be solved by the invention is to provide the digital preparation method of the high-stereoscopic embroidery, which can simplify the process, and realize the high-stereoscopic digital embroidery with low cost and high efficiency.

The technical scheme adopted for solving the technical problems is as follows: the digital preparation method of the high-stereoscopic embroidery comprises the following steps:

designing a pattern datum line;

designing a trace unit including a plurality of traces constituting a polyline;

adjusting the upper thread tension and the lower thread tension of the embroidery machine to form twisted points of the upper thread and the lower thread on the back surface of the embroidery cloth;

and embroidering a plurality of stitch units on the embroidery cloth, wherein the stitch units are sequentially arranged on the pattern reference lines, and forming high-three-dimensional embroidery on the back surface of the embroidery cloth.

Further, when designing the stitch unit, the stitch gap is set to enable the embroidery thread in the stitch unit to be extruded, and the stitch gap is the vertical distance from any needle falling point in the stitch unit to the stitch adjacent to the any needle falling point.

Further, the stitch gap is smaller than the stitch fineness.

Further, the method further comprises the step of adjusting the length and the outer contour width of the stitch unit between the step of designing the stitch unit and the step of embroidering a plurality of stitch units on the embroidery cloth, so that the embroidery threads in the stitch unit are extruded.

Further, the included angle of the stitch forming the fold line is smaller than 90 degrees.

Further, the bobbin thread tension is not less than 2 times the upper thread tension.

Further, the start point and the end point of each stitch unit fall on the pattern reference line, and the start point of each stitch unit is the end point of the last stitch unit.

Further, the stitch unit comprises at least one pair of needle falling points with a stitch gap not larger than the stitch fineness, and the stitch gap is the vertical distance between two adjacent needle falling points on the contour line of the stitch unit.

Further, before the step of embroidering a plurality of stitch units on the embroidery cloth, the method further comprises the step of selecting the stitch layer number.

Further, the stitch unit is in a net shape with a rectangular outline.

Further, the start needle dropping point and the end needle dropping point of the stitch unit are respectively positioned at the centers of the contour lines of the two opposite stitch units.

Further, the start needle dropping point and the end needle dropping point of the stitch are uniformly distributed on the contour lines of the two opposite stitch units.

Further, the stitch unit includes four sub-stitch units in an x shape and arranged clockwise, and a start point of each sub-stitch unit is an end point of a previous sub-stitch unit.

Further, the trace in the sub-trace unit overlaps at least one other trace in the same sub-trace unit.

Advantageous effects

Due to the adoption of the technical scheme, compared with the prior art, the invention has the following advantages and positive effects:

(1) By adjusting the bottom thread tension and the top thread tension, the loose top thread is pulled to the back surface of the embroidery cloth by the tight bottom thread, and the joint formed by twisting the top thread and the bottom thread is formed on the back surface of the embroidery cloth, so that only one top thread is arranged under the track of the top thread trace of the embroidery cloth, and the bottom thread and the two top threads twisted with the bottom thread are arranged under the track of the back surface trace of the embroidery cloth, so that the embroidery threads are extruded and stacked on the back surface of the embroidery cloth to form a three-dimensional effect;

(2) The embroidery machine can apply pressure to the embroidery cloth and embroidery threads in the reverse direction of the embroidery cloth when the embroidery machine falls down the embroidery threads each time, the embroidery cloth can be slightly raised to the reverse side when the embroidery machine falls down the embroidery threads each time, and the pushing of the embroidery threads by the embroidery machine and the embroidery threads by the embroidery machine needle and the embroidery presser foot counteracts partial force of the bottom threads pulled to the front side of the embroidery cloth, so that the reverse side of the embroidery cloth is used as the front side of the embroidery product, and a high-stereoscopic effect is easier to obtain;

(3) The stitch unit is designed to be in a fold line shape, the upper thread is pulled to the back surface of the embroidery cloth more by matching with the trend of the fold line, and when the bottom thread tension is constant, the smaller the fold line included angle is, the larger the pulling force applied to the upper thread is, and the more the upper thread is pulled to the back surface of the embroidery cloth. When the tension difference between the upper thread and the lower thread is extremely large and the included angle of the fold line is close to 0 DEG, the lower thread consumption is extremely reduced, and the trace track on the back surface of the embroidery cloth is almost filled by the two upper threads;

(4) The stitch gap is reduced to be close to or smaller than the stitch fineness, so that the stitch is extruded in a horizontal space to bulge towards a vertical space, and then the stitch layers are overlapped to cause accumulation in the vertical space, so that the effect of high three-dimensional degree is achieved.

Drawings

FIG. 1 is a flow chart of a first embodiment of the present invention;

FIG. 2 is a schematic view of a sample reference line according to a first embodiment of the present invention;

FIG. 3 is a diagram of a mesh trace element according to a first embodiment of the present invention;

FIG. 4 is a sample view of the first embodiment of the present invention;

FIG. 5 is a comparison of parameters related to a sample embroidery in a first embodiment of the invention;

FIG. 6 is a diagram of a seedling embroidered product in a second embodiment of the invention;

FIG. 7 is a schematic diagram of a pattern reference line according to a second embodiment of the present invention;

FIG. 8 is a schematic diagram of a stitch unit for simulated plaiting in a second embodiment of the invention;

fig. 9 is a diagram of a digital embroidery textile according to a second embodiment of the present invention.

Detailed Description

The invention will be further illustrated with reference to specific examples. It is to be understood that these examples are illustrative of the present invention and are not intended to limit the scope of the present invention. Further, it is understood that various changes and modifications may be made by those skilled in the art after reading the teachings of the present invention, and such equivalents are intended to fall within the scope of the claims appended hereto.

The first embodiment of the invention relates to a digital preparation method of a high-stereoscopic embroidery, as shown in fig. 1, comprising the following steps:

(1) Designing a pattern datum line, and obtaining the pattern datum line through computerized embroidery software platemaking, manual platemaking or other conventional manners in the industry;

(2) Designing a stitch unit containing a broken line shape, wherein the stitch unit comprises a plurality of stitches forming a broken line;

(3) Adjusting stitch gaps to be close to or smaller than stitch fineness;

(4) Selecting the number of stitch layers;

(5) Adjusting the upper thread tension and the lower thread tension of the embroidery machine to form twisted points of the upper thread and the lower thread on the back surface of the embroidery cloth;

(6) Embroidering;

(7) The three-dimensional effect of the back surface of the embroidery cloth is taken as the front surface of the embroidery product.

The stitch is an embroidery thread between two needle falling points of needle falling in sequence, the stitch unit consists of a plurality of stitches, overlapping is formed among the stitches, and the included angle of a fold line is preferably smaller than 90 degrees; the number of traces contained in the trace unit is not limited.

As shown in fig. 2, the pattern reference line is the basis of the arrangement of the trace elements. The starting point and the ending point of each stitch unit fall on the pattern datum line, the needle falling starting point of the first stitch unit coincides with the pattern datum line starting point, and then the needle falling starting point of each stitch unit is the needle falling ending point of the last stitch unit, so that the stitch units are sequentially arranged on the pattern datum line.

The vertical distance from any needle falling point in the stitch unit to the adjacent stitch is set as the stitch gap, and the stitch can be extruded by adjusting the stitch gap. Taking 40-count embroidery threads as an example, the actual width of the embroidery threads is about 0.5mm, the linear distance between at least one pair of adjacent needle falling points in the stitch unit is adjusted to be close to or smaller than 0.5mm, the embroidery threads can be extruded because the fineness is larger than the stitch gap, and as shown in fig. 3, the linear distance between the needle falling points 1 and 11 is adjusted to be close to or smaller than the stitch fineness, so that the embroidery threads can be extruded.

The stitch gap may also be measured by the length or outer contour width of the stitch unit. As shown in fig. 3, the outermost needle dropping point of the stitch unit forms the outer contour of the stitch unit, the length of the stitch unit is set to be the linear distance between the start needle dropping point and the end needle dropping point of the stitch unit, the straight line where the start needle dropping point and the end needle dropping point of the stitch unit are located is taken as the projection direction, the perpendicular line of the straight line is taken as the projection base line, and the width of the outer contour of the stitch unit is set to be the length of the projection of the outer contour of the stitch unit on the projection base line. For the same stitch unit, the smaller the length and the outer contour width of the stitch unit are, the smaller the stitch gap is, so that the embroidery thread is extruded.

By small upper thread tension and large lower thread tension is meant that the upper thread tension is smaller than normal and the lower thread tension is greater than normal compared to the embroidery tension that keeps the front and back sides of the embroidery cloth flat. More preferably, the bobbin thread tension may be set to be not less than 2 times the upper thread tension.

The three-dimensional effect of the invention is based on the following 3 major principles:

1. two upper threads are arranged under the same stitch track on the back surface of the embroidery cloth: the common embroidery operation adjusts the tension of the upper thread and the lower thread to a balanced state, so that the twisted joint of the upper thread and the lower thread is formed in the thickness of the embroidery cloth and cannot be directly observed on the front side and the back side of the embroidery cloth. By adjusting the bottom thread tension and the upper thread tension, the loose upper thread is pulled to the back surface of the embroidery cloth by the tight bottom thread, and the joint formed by twisting the upper thread and the bottom thread is formed on the back surface of the embroidery cloth, so that only one upper thread is arranged under the track of the upper thread trace on the front surface of the embroidery cloth, and the bottom thread and two upper threads twisted with the bottom thread are arranged under the track of the lower thread trace on the back surface of the embroidery cloth. Secondly, when the stitch unit contains a fold line shape, the upper thread is pulled to the back surface of the embroidery cloth more by matching with the trend of the fold line, the smaller the included angle of the fold line, the larger the pulling force applied to the upper thread when the tension of the bottom thread is fixed, and the more the upper thread is pulled to the back surface of the embroidery cloth. When the tension difference between the upper thread and the lower thread is extremely large and the included angle of the fold line is close to 0 DEG, the dosage of the lower thread is extremely reduced, and the trace track on the back surface of the embroidery cloth is almost filled by the two upper threads.

2. And (3) embroidery thread extrusion and stacking: the stitch gap is reduced to enable the stitch gap to be close to or smaller than the stitch fineness, so that the stitch is extruded in a horizontal space to bulge towards a vertical space, and then the stitch layers are overlapped to cause accumulation in the vertical space, thereby achieving the effect of high three-dimensional degree.

3. The machine needle and the presser foot push the embroidery cloth to bulge towards the back surface of the embroidery cloth in the embroidery operation, and drive more embroidery threads to the back surface of the embroidery cloth: the embroidery machine can apply pressure to the embroidery cloth and the embroidery thread in the reverse direction of the embroidery cloth by the machine needle and the presser foot every time the embroidery machine falls down, and each time the embroidery machine falls down the needle, the embroidery cloth can cause micro-bulge in the reverse direction. The push of the sewing needle and the presser foot to the embroidery thread counteracts the partial force of the bottom thread pulled to the front surface of the embroidery cloth, and even if the tension of the upper thread is adjusted to be 2 times greater than that of the bottom thread, the three-dimensional effect is difficult to form on the thread surface of the embroidery cloth, so that the method is more suitable for forming the high-three-dimensional effect on the back surface of the embroidery cloth.

According to the above process flow, 7 embroidery samples were produced using a japanese JANOME MC550E digital embroidery machine and the sample thickness was measured. The method comprises the following specific steps:

(1) Sample datum line is designed through computerized embroidery software plate making: the sample of the embodiment adopts a square pattern with the side length of 4.8cm, and squares are filled with a square-shaped datum line, and a datum line design diagram is shown in figure 2.

(2) Designing a stitch unit containing a broken line shape: the trace elements are designed in a net shape as shown in fig. 3. The distance between the needle falling starting point 1 and the needle falling ending point 24 of the stitch unit is the length of the stitch unit, the needle falling starting point 1 and the needle falling ending point 24 are respectively used as auxiliary lines c and d of vertical lines of the connection lines of the starting point and the ending point, 5 needle falling points are respectively selected from the two ends of the auxiliary lines c and d at equal intervals by taking the needle falling starting point 1 and the needle falling ending point 24 as the centers, and the straight line distance between the two needle falling points at the outermost ends of the auxiliary lines is the outer contour width of the stitch unit. The trace units are sequentially walked out according to the needle falling points 1, 2, 3, … … and 24.

(3) Adjusting stitch gap to be close to or smaller than stitch fineness: the upper thread and the lower thread are respectively SUPERIOR KING TUT embroidered threads of 40wt.A stitch needle is a SCHMETZ brand 16-number needle, the number of layers of stitch is kept to be 2 layers, the upper thread and the lower thread are respectively tensioned to be 2g and 20g, the outer contour width and the length of the stitch unit are respectively 4mm, 2mm,6mm, 3mm,8mm and 4mm, and the sample objects are shown in figure 4.

(4) Selecting the number of stitch layers: the outer contour width and length of the stitch unit are kept to be 6mm and 3mm, the upper thread and bottom thread tension is kept to be 2g and 20g, and the test samples 4# and 2# and 5# with the stitch layers of 1, 2 and 3 layers are respectively arranged, and the test sample is shown in figure 4.

(5) Adjusting the upper thread tension and the lower thread tension of the embroidery machine: the outer contour width and length of the stitch unit are kept to be 6mm and 3mm, the number of stitch layers is 2, 3 pairs of 3 samples 2#, 6#, 7# with surface tension and bottom tension of 2g, 20g,5g, 20g,8g and 20g are respectively arranged, and the sample objects are shown in figure 4.

The thickness measurement was carried out on 7 embroidery samples, and the measurement standard was in accordance with GB/T3820-1997 "measurement of thickness of textiles and textile articles". The thickness arithmetic average of 7 embroidery samples obtained by 5 experiments with a presser foot area of 50mm2, a pressing pressure of 50kPa, and a pressing time of 10s using a YG (B) 141D thickness gauge is shown in tables 1, 2, and 3 in fig. 5.

As is clear from table 1, the thickness of the comparative samples 3#, 2#, and 1# increases in order, indicating that the stitch gap is smaller, and the compression between embroidery wires increases, thereby improving the stereoscopic effect. As can be seen from Table 2, the thicknesses of the comparative samples No. 4, no. 2 and No. 5 were successively increased, indicating that the number of superimposed stitch layers could achieve a better stereoscopic effect. As is clear from Table 3, the comparison of the samples No. 7, no. 6 and No. 1 shows that the thickness of the samples increases in order, and that the smaller ratio of the tension of the bottom line of the upper line causes more upper line to be pulled to the back surface of the embroidery cloth, thereby improving the three-dimensional effect.

The experimental results show that the three-dimensional embroidery effect can be effectively improved by designing the stitch unit shape with the fold line shape, reducing the stitch gap and increasing the stitch layer number and the tension ratio of the bottom stitch of the embroidery machine.

The second embodiment of the invention relates to a digital preparation method of high-stereoscopic embroidery, which is used for simulating the manufacturing flow of a digital embroidery with stereoscopic effect of seedling embroidery hand embroidery. The simulated seedling embroidered hand embroidered physical object is shown in fig. 6, and the hand embroidered includes two embroideries of plait embroidering with three-dimensional sense and crepe embroidering. The braid embroidery is similar to the crepe embroidery, 8 strands of embroidery threads are firstly braided into braid, the braid embroidery is characterized in that the braid is flatly paved and coiled on the embroidery cloth, and the three-dimensional effect is mainly influenced by the thickness of the braid; the crepe embroidery is characterized in that the braid wavy coil is fixed on the embroidery cloth, and the three-dimensional sense is mainly influenced by the thickness of the braid and the coil mode of the braid wavy coil.

The embodiment is manufactured by using a Japanese JANOME MC550E digital embroidery machine, and the specific steps are as follows.

(1) Pattern datum line is designed through computerized embroidery software plate making: referring to the seedling embroidering hand embroidering real object, a digital embroidering datum line is drawn as shown in fig. 7, a solid line in the figure is a creping datum line, and a dotted line is a braid embroidering datum line.

(2) Designing a stitch unit containing a broken line shape: to simulate the wavy relief of the crepe, the stitch units of the simulated crepe are identical to the mesh stitch units of the first embodiment, as shown in fig. 3. In order to simulate the flat three-dimensional sense of the plait embroidery plait, the stitch unit is designed into a net shape formed by 4X-shaped stitch units, the needle falling sequence of the stitch unit is as shown in figure 8, and the stitch units are sequentially arranged according to needle falling points 1, 2, 3, … … and 28. The linear distance between the stitch unit drop start point 1 and the drop end point 28 is the length of the stitch unit, and the linear distance between the drop point 2 and the drop point 13 is the outer contour width of the stitch unit.

(3) Adjusting stitch gap to be close to or smaller than stitch fineness: the 120D/2 FUJIX KING STAR embroidery thread which is close to the fineness of the hand embroidery thread is selected as the upper thread and the bottom thread embroidery thread, 4 colors which are similar to the hand embroidery color are prepared, and the embroidery needle adopts a SCHMETZ brand 9-number needle. The measured braid width of the seedling embroidered crepe was about 2.8mm, one wave was 1mm long, the braid used for the seedling embroidered braid embroidered was the same as the crepe embroidered, and the braid width was the same as 2.8mm, as shown in fig. 6. The outer contour width of the stitch unit of the adjustment simulation crepe embroidery is equal to the width of the hand embroidery crepe embroidery braid, and the length of the stitch unit is equal to one wave length of the hand embroidery crepe embroidery, namely the outer contour width and the length of the stitch unit of the setting simulation crepe embroidery are respectively 2.8mm and 1mm. Similarly, the width and the length of the outer outline of the stitch unit for simulating the plait embroidery are respectively 1.5mm and 2.5mm.

(4) Selecting the number of stitch layers: 2 layers.

(5) Adjusting the upper thread tension and the lower thread tension of the embroidery machine: the upper thread and lower thread tension were 3.4g and 13g, respectively.

(6) Embroidering: the digital embroidery physical image shown in figure 9 is obtained by taking the back of the embroidery cloth as the front of the embroidery finished product.

At an embroidery machine speed of 400 needles/min, only 36 minutes were required to complete the embroidery product. The digital stereoscopic embroidery of the seedling-imitating embroidering wrinkling embroidery and plait embroidery can be repeatedly produced in large batch without complex skill training.

The invention can achieve the three-dimensional embroidery effect with the thickness of 2-3mm by matching 5 digital embroidery parameters of the stitch unit, the stitch gap, the stitch layer number, the embroidery fineness and the upper thread and bottom thread tension. And by specially designing the stitch unit, the hand embroidery technique such as seedling embroidery crepe embroidery, plait embroidery and the like can be imitated. By setting high three-dimensional digital embroidery process parameters and through automatic operation of a digital embroidery machine, compared with manual embroidery, the embroidery machine is time-saving and labor-saving, and embroidery products with good simulation degree and three-dimensional sense can be manufactured without grinding for years of skill.

The foregoing is merely a preferred embodiment of the present invention, but the design concept of the present invention is not limited thereto, and any insubstantial modification of the present invention by using the concept shall fall within the scope of the present invention.

Claims (6)

1. The digital preparation method of the high-stereoscopic embroidery is characterized by comprising the following steps of:

designing a pattern datum line;

designing a trace unit including a plurality of traces constituting a polyline;

adjusting the upper thread tension and the lower thread tension of the embroidery machine to form twisted points of the upper thread and the lower thread on the back surface of the embroidery cloth;

and embroidering a plurality of stitch units on the embroidery cloth, wherein the stitch units are sequentially arranged on the pattern reference lines, and forming high-three-dimensional embroidery on the back surface of the embroidery cloth.

2. The method according to claim 1, wherein the stitch unit is designed such that the stitch in the stitch unit is extruded by setting a stitch gap, the stitch gap being a vertical distance from any needle drop point in the stitch unit to the stitch adjacent to the any needle drop point.

3. The method of claim 2, wherein the stitch gap is less than stitch fineness.

4. The method according to claim 1, wherein between the step of designing the stitch unit and the step of embroidering a plurality of stitch units on the embroidery cloth, the method further comprises the step of adjusting the length and the outer contour width of the stitch unit to squeeze the embroidery threads in the stitch unit.

5. The method of claim 1, wherein the stitch forms a fold line having an included angle of less than 90 °.

6. The manufacturing method according to claim 1, wherein the bobbin thread tension is not less than 2 times the upper thread tension.