Production Plan For Women'S Underwear Factory

Abstract: Taking bra and pants suit as an example, this paper starts with the technological characteristics of women's underwear, analyzes the technological process of typical products, and discusses in detail the main points, steps and equipment selection of the sewing production line design.

Combined with the characteristics of women's underwear, it puts forward the corresponding equipment configuration and arrangement plan for sewing production line, and provides ideas and materials for enterprises to build production lines.

Key words: process analysis, process establishment, production line.

Women's underwear originated in the early 1930s, mainly used to correct the female body and maintain the stability and coordination of the chest during physical exercise, thereby preventing the deformation of the female chest and the convenience and comfort during exercise.

Women's underwear mainly includes brassiere, briefs, pants and conjoined clothes.

Before 60s, women's underwear emphasized the curve of human body; after 70s, it mainly emphasized the function of correcting human body.

Because of the special functional requirements of women's underwear, it is necessary for them to be in

Selection, process and many other aspects are very different from ordinary garments, so the design of production line and equipment selection have certain particularity.

1. processing technology and equipment analysis

1.1 process characteristics

1) because of the direct contact between women's underwear and human body, the connection seam of the garment piece needs to be lapped. The purpose is to make the stitched mouth of the underwear after processing smooth and hard, ensuring the comfort of underwear when wearing.

2) in order to improve the function of the human body, the materials and finished products of women's underwear should be well retractable. Therefore, the elastic characteristics such as elastic suture and font stitching should be used in the production process and accessories selection.

3) because the composition of elastic fabric contains more chemical fiber material, the melting point of underwear fabric and suture is low. When sewing speed is accelerated, the seam will be blown, or the fabric will melt holes, which will affect the quality and speed of processing.

In order to solve this problem, we can take corresponding "needle heat countermeasures" in production, such as adding silicone oil emulsion on the line, or installing cold air pipes to reduce the high speed.

The temperature rise.

1.2 device selection

Because of the particularity of the technology, the processing equipment used for women's underwear is also different from other garments.

1) cutting equipment can not only use the usual "straight knife", because the underwear clothing piece is small, cutting is not easy to grasp, resulting in the accuracy of the film layer is not enough.

The belt trimming machine (also called the belt cutter) will improve the cutting accuracy of the film.

The blade width with a knife is only about 1cm. When cutting, the blade layer can be flexibly rotated, which is suitable for cutting the small piece of clothing.

2) apart from the commonly used types of sewing machines, such as single needle sewing machine, three wire and four thread sewing machine, and knot stitching machine, sewing machines suitable for women's underwear characteristics should be selected. For example, the word machine is the most used sewing equipment for women's underwear, and the four point machine should be used for the combination of the bra cups and the pants pants.

2. Crescent machine: it can form the effect of flower teeth. It is used for decorating and reinforcing the cloth at the center line of the front and back pieces of the pants and the clothes.

Double needle machine: two parallel lines are formed at one time to stitch the knitting strip at the bottom of the cup so as to form a hollow state and facilitate the insertion of the steel ring and glue bone.

1.3 process analysis

When designing a lingerie line, in order to determine the number of sewing machines and production lines more accurately, we need to analyze the sewing process of the products to be put into operation, that is, decomposing all the operations of the process of making the basic material of clothing into finished products, holding the important technical parameters such as the nature of operation, sequence, equipment and time spent in each processing step, and making out the process flow chart or process analysis table.

After process analysis, the working time in each sewing process is based on the relevant information and experience, aiming at improving the enthusiasm of the operator, taking into consideration the standard processing time of the operator's skill level, mood and spare time.

The total processing time of loading and unloading is 826.8 seconds plus 671.9 seconds =1498.7 seconds.

The standard processing time of each process should be scientifically and impartially formulated on the basis of the actual production conditions of the enterprise, such as the performance of the equipment, the skill level of the workers, and the floating rate of the workshop.

2. design parameters of sewing production line

2.1 determination of production volume

When designing a new garment production line, it is necessary to determine the appropriate production scale from the market demand for such products or from the market share to be occupied.

In the past, the demand for underwear was not high, and the varieties and styles on the market were relatively single.

With the improvement of people's consumption level and taste, the choice of underwear has begun to be valued and choosed, forcing underwear enterprises to turn from fewer varieties and mass production mode to multiple varieties and small batch.

Therefore, when designing the investment production line, the flexibility of production should be taken into account. The production capacity of each line can not be designed too big, and the boat is small and good to turn around.

When the market is stable and improving, consider increasing the number of lines to accommodate different styles of processing.

For example, the planned daily output of a production line will be set at about 400 units.

The planned output is the basic production capacity of the production line.

When the product style changes, the daily output will be changed due to the familiarity of the workers.

Based on the planned daily output and the standard processing time of typical products, the number of workers in the sewing production line and the type and quantity of equipment needed are estimated.

2.2 production line plan

The number of planned workers in the sewing production line is initially set to 21, and other workers can be proportionately equipped.

2.3 average processing time of the production line (i.e. beat time).

2.4 number of machines needed for each process (Nmin)

Among them: Ta -- the time required for the nature of a certain product in the production process.

According to the above formula, the number of equipment needed for each process can be calculated, as shown in Table 1.

Table 1 women's style

Table of types and quantities of equipment required for each process (take 400 sets of Nissan as an example)

The number of equipment required for operation time (seconds) and downloading operation time (seconds).

The calculated value is used.

Single needle flat seam 255.2 116.1 5.2+1 6

Double needle flat seam 4822.2 0.98+1 2

Three wire seam 19.2 0.27+1 1

Four wire seam 68 0.95+1 2

Two words 228.3 209.2 6.1+1 7

Four points 36145.1 2.5+1 4

Knotting 5527.3 1.15+1 2

Crescent 48 0.67+1 2

Manual ironing or case work 185.136 3+1 4

Total 826.8 671.930

3. sewing production line arrangement plan

Before the production line is arranged, the processing of typical products should be simulated "working procedure" to determine the type and quantity of the required equipment and to be used as a reference for the arrangement of production lines.

"Working procedure" is the working procedure of the product parts that will be made, and it is rationally allocated to the operator with the ability to do the corresponding process, and the amount of work done by each operator is roughly equal to make the production line as balanced as possible.

When the process is compiled, the time value (that is, the average processing time) should be taken as the first, and the work time of each station is similar, and the phenomenon of "bottleneck" should not appear.

In actual production, when the efficiency of process establishment is above 85%, production is easy to maintain relative balance.

There are three options to consider when assigning processes based on time value.

1) one person completes a process or several people complete a process.

This scheme is used for small variety and mass production, and the process subdivision makes the operation of the operator specialization, which is conducive to the improvement of operation speed and quality.

But in this way, the adaptability of the operators to the new varieties is relatively low, and the production volume will be greatly affected when the varieties are renewed.

Therefore, it is not suitable for many varieties and less batch production.

2) classification of processes of similar nature and assigned to a job operator.

This scheme can be used for multi variety and low volume production, because operators need to complete different processes every time and have strong adaptability. When changing varieties, they can quickly accept new tasks.

However, the training cost of personnel is relatively large, and skilled workers must be used.

In addition, due to the merger of similar processes, countercurrent crossover will occur, resulting in some difficulties in work process and management of processes.

3) one person can complete several different processes, which can be adapted to many kinds of production and there will be no cross flow phenomenon. Because one person is responsible for several machines, the cost of equipment investment is large.

In the actual process arrangement, three schemes often coexist.

In addition, we should pay attention to the processing of garment parts and the combined processing procedures as far as possible, and be completed by different operators.

If a worker's work contents include both parts and components, there will be a return phenomenon of semi-finished products, which will increase the distance of work in progress.

At the same time, we should consider the characteristics of the operator, that is, the skill of the operator should match the work assigned.

According to the process flow chart and other related information,

The process plan can be drawn up as shown below.

An example of sewing procedure for a woman's underwear

Job number, procedure number, operation time (seconds) nature of operation

One A-1, A-2 55.2, three lines, four points.

Two A-3 64 single stitch seam

Triple a -4, A-5 72 single stitch seam

Four A-6, A-7 72 single stitch, manual

Five A-8 64 single needle

Six A-9, A-10 72 manual

Seven A-11, A-12 76.8 two words.

Eight A-13, A-14 72 two words.

Nine A-15 48 double needles

Ten A-16, A-21 77.1 manual

Eleven A-17, A-18 79.5 two words.

Twelve A-19, B-16 82.3 knot.

Thirteen B-1, B-7 60.9 single stitch seam

Fourteen B-2, B-8 73.1, four words.

Fifteen B-3, B-4 74.4 single stitch, two words.

Sixteen B-5, B-6 70.2 crescent, double needles.

Seventeen B-9 72 four points

Eighteen B-10, B-11 68 four seam stitch

Nineteen B-12, B-13 85.4* two words

Twenty B-14, B-15 85.4* two words

Twenty-one B-17, B-18, A-20 74.4 single stitch, manual.

Note: other factors such as the skill level of the operator should also be considered when the actual working procedure is compiled. Here is only a theoretical example.

"*" is the difficulty time.

In order to arrange the production line, each station equipment should be arranged sequentially according to the order of the sewing process, so as to avoid cross flow as far as possible, so as to reduce the pmission of materials or semi-finished products among all workstations, and effectively shorten the production process by using time effectively.

The production line can choose the traditional progressive bundled chip assembly line, as shown in Figure 4.

In view of the fact that women's underwear has many garment pieces, the process is complex and the styles are changing rapidly.

Therefore, when enterprises have certain production sites and investment funds are allowed, modular arrangement can be considered.

That is to say, underwear is divided into production groups according to the type of parts, as shown in Figure 5.

The semi finished products can be pferred between the production modules with suitable instruments, because the modules can be clearly identified, which is conducive to the pmission of semi-finished products.

After the arrangement of the process and the production line, there is a certain discrepancy between the equipment required by the women's underwear and the measured value. Therefore, when the enterprise configuring the production line, it depends on the specific circumstances.

A list of women's lingerie equipment (take 400 sets of Nissan as an example)

Equipment type, equipment quantity (station) reserve

Single needle sewing machine 7

Double needle sewing machine 2

Three wire sewing machine 1

Four wire sewing machine 11

Four point machine 31

Two point machine 6

Knotting machine 11

Crescent machine 11

Chopping board 4

Keyhole machine 1

Button sewing machine 1

A total of 26 sets of 6 units.

Note: in view of the change of style, one button machine and one button sewing machine should be provided.

In short, enterprises should not blindly invest in building a new production line.

After determining the type and scale of production, we should choose the best type of processing equipment and the number of workers according to the minimum investment.

Among them, the most important thing is the design of the sewing production line, the cutting and finishing line.

This is all done on this basis.