How to choose a spring box for upholstered furniture? Characteristics and production of spring blocks

At the heart of any upholstered furniture, whether it's a sofa or a mattress, is a spring box. It provides elasticity and softness of the structure. The performance of the headset or bed depends on what kind of design it is.

In modern production is found both a mattress on the spring block, and with fillers. So the choice is for consumers.

At the heart of many modern mattresses is a spring box, which can in some cases provide orthopedic support of the body. The current production presents two options:

- Bonnel spring unit;

- The spring unit is independent.

Springs "Bonnel"

From the category of economical blocks. In the standard, it has 4 coil springs of biconical shape. They are installed in one row, and for the connection, spirals are used in the upper and lower parts.

Such spring blocks for upholstered furniture are called blocks of continuous weaving. It is worth noting immediately that there is no orthopedic effect in this model. This is due to the fact that all springs are connected in a single whole, that is, when one element is deformed, all nearby springs are bent.

If the domestic firm is engaged in production, then the cost of such a product will vary within the limits of 1000-10 000 rubles. People who have any problems with posture, joints and spine as a whole, this option is strictly contraindicated. Such a spring box will not get better, even if an expensive filler is used in combination with it.

Independent springs

This variant of mattresses is much better, since at least the production of spring blocks of this category is similar to the way the spring block "Bonnel" is manufactured, yet the diameter of their elements is much smaller. In this version, the maximum circumference reaches only 20 mm, with no more than 8 turns. Thus, one square meter of such a unit has from 250 to 1200 springs. The shape of the elements resembles kegs.

Orthopedic effect is achieved by placing each spiral in a separate cover, which ensures their independence from each other. Accordingly, when there is an impact on an individual spring, neighboring ones are not affected, which allows more even distribution of the load on the entire surface.

Pocket Spring in mattresses

The spring unit Pocket Spring is a system of independent springs. This design is used in all modern mattresses, which allows you to choose beds in which there is no base under the mattress. Only special fasteners are needed in the corners, which will fix the product. Also, there is a frame that provides rigidity and elasticity when carrying loads. Such mattresses can also be used as a separate couch by equipping them with special furniture legs. The outer lining material is jacquard fabric.

The idea of a spring block

Such an element as a spring was invented a long time ago, but to unite them into a single system came up with the Italian military. A similar design was used in Italy, when sappers deactivated mines in the fields. After all, the spring-independent unit allows evenly distributing the load of the human body over the entire surface, rather than on one particular site.

But not everyone agrees with this legend, although this is documentary evidence of those times.

Design features of springs

Depending on the size of the springs, there are several categories of mattresses:

1. If the spring has a diameter of 50-60 mm, then the spring butene block is called TFK, S-500 or EVS500. In this embodiment, each element has its own cover. The average density is 220-300 springs per square meter. meter. Domestic products are cheaper than imported analogues in 2-3 times, since the delivery of the latter is laborious enough. And all because of the fact that this product can not be rolled up.

2. Springs of 20-40 mm are called S-1000 and S-2000. The small size allows to increase the number of springs by one square meter, so it reaches 500-1000 pieces. This design was called anatomical, because it is able to more clearly repeat the silhouette. In addition, such springs can evenly distribute the load to all areas of the surface. In comparison with the previous version, rigidity will be higher, which allows to expand the weight category of people.

Double springs

There are universal mattresses, which combine the springs of small and large diameter. They are called "spring in a spring". In this variant, the narrower element is placed inside a wider one. The rigidity of the latter is somewhat less than that of the former.

If there is an average load on such a bed, only large springs are deformed. As soon as the weight increases, small children will join the work. This option is great for those who have a difference in weight with the spouse of more than 40 kilograms.

Performance characteristics of springs

Since mattresses to date are often made to order, manufacturers offer customers to consider the following additional options:

1. Strengthening . In this case, the spring unit is designed for those who are overweight. The design can be strengthened by means of a double wire or the creation of a chess order by springs. In the second case, they will be more closely adjacent to each other. In mattresses "Bonnel" reinforcement occurs due to insertions from the PPU inside the spirals.

2. Zonal spring block. In this design, there are separately identified zones that have individual rigidity. They are arranged in accordance with human anatomy. Since each part of the body has its own weight, when a person lays down on any surface, there is an unequal load on each site. Therefore, to maintain the body in the correct form, you need different rigidity.

Zones can be 3, 5 or 7, depending on the model of the mattress. But this option is not available for all manufacturers.

3. Half blocks. One of the longitudinal halves has more rigid springs, and the second - softer. This option is convenient for those couples in which one likes to sleep on a hard, and the other - on a soft.

Fillers for mattresses

In most cases, the spirals inside have soft upholstery. This is done so that the product is not severely deformed when the person is sitting on the edge. Inside the mattress a box is created, where there is an upper and a lower soft layer.

Depending on what material is used for such purposes, the stiffness property will be determined. For example, in more rigid designs, coconut is used, and for soft ones, latex or PPU is used. Some manufacturers use a combination of these materials, which is extremely convenient, since the product is of medium rigidity.

A little bit about the sofas

For sofa designs, the same system is used as for mattresses. The only thing that is paid more attention in this case is the filler, since the sofa is more often intended for sitting, not for lying. But this does not mean that it should be less comfortable.

The best option is when the furniture has both a filler and springs. Today, the best duet is polyurethane foam and a spring unit for the sofa. The price of these products is somewhat high, but this is because such furniture has an orthopedic effect. The structure of the PPU has good recovery ability, without any restrictions on the mass. Also, such a filler is well suited to those who suffer from allergies or asthma.

Another popular and high quality filler is latex. Since this is generally a first-class material, the price for such products will be even higher. If you buy a quality product, you can not be afraid that during intensive use of light springs spring out. If the technology was observed in the production process, there are many layers of different materials between the spirals and the upper skin that hold the springs in their places.

But still in the sofas there are more spring blocks with dependent spirals.

Types of blocks

Spring blocks can be of the following types:

1. Frameless . This type consists of two-cone springs and spirals that connect them. This version is applicable in those headsets, where there is only one or two soft sides, which are formed due to the unity of the deck of a stable board.

2. One-sided . In this version, the springs have a metal frame that surrounds the entire working plane. It fulfills the role of a frame, the edges of which are fastened with materials of soft flooring. If the block is assembled manually, this element still helps to achieve the desired shape stability (block and soft element). This option is applicable to single-sided soft elements.

3. Two-sided . This configuration of blocks differs in the number of frames, that is, there are two of them. Accordingly, and the scope of their application is where the furniture has two soft sides.

Regardless of the type of unit, they are based on springs made from wire, for which, in turn, carbon steel is taken . With the right technology, every element lends itself to a holiday. This is done to ensure that the metal is stabilized in its size and hardened, otherwise during the operation of the product on the surface will appear bumps due to the fact that the spring block is strongly deformed.

Production technology

Spring blocks for upholstered furniture or mattresses can be assembled using automated techniques or manually. At once it is worth noting that in the first case the production has a higher quality than in the second.

Manufacture of spring blocks of manual assembly has the following steps:

1. In order to make double-cone springs, first correct the base wire, then it is wound onto special shapes to get the spirals themselves. After that, twist the knots on the main turns, and only then the elements give heat treatment.

2. The next stage is the creation of fastening spirals, for which the wire is again corrected, and then the winding is carried out.

3. In order to make a frame, rule the flattened tape or wire. After that, she is given the necessary shape and connects all the ends together.

4. After the connecting spiral, the coil springs are fixed to create a frame-free unit.

5. Also the connecting braces are made. This is called stamping.

6. Then everything is joined in one design, that is, the frame and springs are united by means of staples.

Of course, every step goes through careful monitoring. But here at manual assemblage all the same there is a human factor which sometimes negatively influences quality of a design of the block.

As for the automated production, the workshops are equipped with the G-65 / SW series. Such machines conduct all the work themselves according to predetermined parameters.

Also, not the least role is played by the manufacturer. After all, a well-known brand will always maximize its brand, trying to create products of the highest quality. Therefore, it is worth giving preference to well-known manufacturers who have already successfully proven themselves in the market.