When sewing knitwear, knitted items and split the tissues, an important issue is the proper handling of the edges.
It can not be done on an electric or electro-mechanical sewing machine due to the inelasticity of made lines, which leads to deformation of the finished product.
For quality of the seams in knitwear special rasposhivalnye machines were created. They produce a smooth, elastic stitching on stretching the tissues.
Content:
- application
- How to choose a car rasposhivalnuyu
- Kinds
- Equipment
application
Rasposhivalnaya (another name - ploskoshovnaya) machine designed to perform a reliable flat seams on elastic and flowing materials.
Often it is used for hemming bottom knitted T-shirts, shirts, jumpers chiffon, undergarments, processing sleeves and collars on shirts, etc.
Such devices have many similarities with the functional overlock koverlokami and which are intended for handling or product in the hem sections.
Flat seams are used during various sewing works which are associated with the processing of the products in slices stretch and knitted fabrics in the manufacture of home textiles - curtains, bedspreads, tablecloths, bed sheets, covers and etc.
Special design rasposhivalnoy sewing technique provides uniform flat stitches, which are obtained by the loopers and needles 2-4.
Each model of the device is equipped with a specific set of needles of the upper row and the lower looper to create a flat seam in its various modifications. Also such devices allow for the chain stitch type.
There are models additionally equipped with an expander or niteukladchikom, which is located in the upper part of the body.
The process of performing the flat seam is simple - the upper row of needles are immersed in the tissue, removes them looper thread top and moves to the end position.
In reverse order when immersed in the fabric needle thread is removed from the hook and return to the starting position.
How to choose a car rasposhivalnuyu
When choosing such a sewing technique is recommended to pay attention to the features and technical specifications.
Proven technology from trusted manufacturers to guarantee long-term operation has a wide range of options for working with different types of fabrics and high quality.
Platform and separate conveyor
For ease of sewing machines of the type equipped with a special platform that is intended for the treatment of complex elements or parts of articles.
It helps perform qualitatively obstrochku bottom, leg, sleeves, lapels, collars, wide straps.
Current models of devices equipped with three types of platforms:
- Flat removable platform. It is used for general operations for processing the bottom product in a closed and open cuts, obstrochki piping.
- Platform with a recess under okantovatel. It is suitable to perform high-quality edging things from soft tissue piping.
- With the platform in a cylindrical shape. It is whole or recess is used for fast obstrochki narrow and long parts for sewing children's underwear.
Separate conveyor for feeding the fabric allows you to collect and stretch sliding material for assembly and folds of the desired type.
Operating distance between the end needles
This is a key characteristic that defines the desired width of the lines produced. The standard width of 5.5 and 6.5 mm. Rasposhivalnye devices are: 2 needles (seam width 5.5 mm) and the needle 3 (the bead width 6.5 mm).
Devices with two needles on the 3 threads allow for lines of the same type, and the device with three needles 4 threads - several variations of stitches. Devices with one needle thread 2 are applied to a simple grinding parts of knitwear.
If necessary, you can install only two needles, changing their positions to get different types of flat lines.
Types of flat seams
On rasposhivalnyh machine performs four types of professional flat seams:
- And a triple - width of 5.6 mm;
- Narrow (left and right-hand) - width of 2.8 mm;
automatic needle threading mode
The operating mode is used for automatic filling yarns in the eye of a needle in the expensive models of devices.
Type cloth feed
The machines has a function of differential feeding fabrics for the manufacture of the product.
The standard scheme belts front and rear placement of tissue served at the same speed, some devices provide a partial change in the rate for a single conveyor.
It allows you to perform the desired operation - create assemblies or stretch fabric.
thread tension
In rasposhivalnoy technique provides two options thread tension - manual and automatic. Automatic simplifies the process of tailoring products and minimizes the appearance of possible sewing errors.
When manually adjusting the tensile force for each thread is different, so this method requires skill and an eye estimation.
filling the lower looper device placement
The sewing devices provide a special device for refilling looper, which is arranged in the lower housing.
pressure level adjustment function tabs on the fabric
In rasposhivalnyh machine provides the function to adjust the degree of pressure of the working foot on the fabric when filed. For streaming and split tissue pressure as much as possible, to thick - is minimal.
Different device models have varying degrees of pressure of the foot, so the adjustment is carried out manually or automatically. Automatic adjustment takes into account the type of feed and tissue determines the extent of the required impact on it.
penetration forces
Some models are equipped with an additional power adjustment function of the tissue puncture needle workers. It guarantees the correct execution of stitches at a selected speed, regardless of tissue thickness.
Height adjustment of the foot
This distance is defined between the working surface of the machine and the extreme upper position foot on which it is lying. Height ranging from 3 to 15 mm. Height adjustable smoothly or stepwise switching.
The speed of the sewing operations
This technical parameter model depends on the specific machine and determines the total number of working stitches that can be performed in one minute of time. The average speed is 1000-1500 sewing stitches per minute.
The length of the produced stitch
The distance between adjacent punctures that are made longitudinally, determines the length of the finished stitch. Short stitches are reliable and durable. Furthermore length depends on the purpose for which the suture is intended.
Minimum stitch length is 1-3 mm, and the maximum - from 3 to 6.5 mm.
The width of the produced stitch
Option, which is functionally similar to the previous one, because it determines the width of the finished weld. Wide stitches needed for decorative rasposhivochnyh seams, so the minimum value of 1-5,6 mm maximum - from 3 to 15 mm.
The number of working operations
Modern model cars include execution of a plurality of working operations - from 2 to 51.
Thread cutter
The device provides a thread-cutting after the sewing process. The cost machines it is represented by a plate with a sharp blade, which is mounted at the bottom of the working platform.
The expensive models, it is implemented in the form of automatic controls, which performs thread trimming.
marking color
For ease of use the guide each yarn has an individual color marking disposed on the side of the housing.
Container scraps and threads
Some models are equipped with an inner container which is intended for the collection of yarns and fabric scraps left after sewing.
Capacity and weight
This figure is the maximum power consumption during operation. Modern machines rasposhivalnogo type equipped with a powerful operating mechanism and electronic control, which ensures the correct functioning of the device.
The operating capacity of the device is from 70 to 250 watts.
Excluding the auxiliary tools and accessories of machines may range from 5 to 12 kg.
Protective storage pouch
Reliable storage device provides a protective cover two types - soft and hard. Soft cape made of natural breathable fabric. It secures the working mechanism from dust and moisture.
Hard Case frame type protects the body from mechanical impact products.
Kinds
According to the general classification rasposhivalnye machines are domestic and industrial use. Household devices suitable for use in the home, small private workshops and ateliers tailoring.
Industrial designs are used in large production plants for mass tailoring jersey. Domestic models are equipped with 1-3 needles, industrial options - from 2 to 8.
Unlike home appliances, industrial sewing machines of this kind has large dimensions.
It is equipped with adjusting units, thread tensioners, multiple racks of thread bobbins and niteukladchikom in the upper housing part. Niteukladchik intended for laying the thread face flat line.
In addition, industrial devices are mounted on a special table, which is placed under the electric drive with double pedal.
Industrial equipment used for clothing, knitwear, underwear and bed linen and home textiles. They are focused on the performance of highly specialized sewing operations.
Quality sewing machines equipped with robust ergonomic controls - Switch mode, thread tensioners, working legs, needles and loopers.
When choosing rasposhivalnoy machine should pay attention to the engine noise and smooth running of the working foot. Expensive models feature low noise, smooth running and continuously variable operating modes.
Correct operation of the device depends on correct settings - issuing width and stitch length adjusting foot pressure competent selection of yarns and working needles.
Equipment
The standard equipment for various models of sewing equipment includes the following tools: a screwdriver (large, small), cleaning brush, forceps, needle set, mesh with thread for the coils, coil holder and looper.
When choosing rasposhivalnoy machines are performance critical but the key ones - is the width and length of the lines, ergonomic controls and quietness of the engine.
If you want to perform several types of flat seams, then it is better to give preference to trehigolnym models. Sewing machines located in a separate work surface, so it is recommended to purchase a functional table for him.
