At the heart of any upholstered furniture, be it a sofa or a mattress, is a spring block. It provides elasticity and softness of the structure. The type of construction depends on the performance of the headset or bed.
In modern production, there is both a mattress on a spring block and with fillers. So the choice is up to consumers.
At the heart of many modern mattresses is a spring block, which in some cases can provide orthopedic support for the body. The current production presents two options:
- spring block "Bonnel";
- independent spring block.
Bonnel springs
From the category of economical blocks. As standard, it has 4 double-cone coil springs. They are installed in one row, and spirals are used for connection at the top and bottom.
Such spring blocks for upholstered furniture are called continuous weaving blocks. Immediately it is worth noting the moment that in this model there is no orthopedic effect. This isdue to the fact that all the springs are connected into a single whole, that is, when one element is deformed, all nearby springs are bent.
If a domestic company is engaged in production, then the cost of such a product will vary between 1,000-10,000 rubles. For people who have any problems with posture, joints and the spine as a whole, this option is categorically contraindicated. Such a spring block will not get better, even if expensive filler is used in combination with it.
Independent springs
This version of mattresses is much better, since although the production of spring blocks of this category is similar to how the Bonnel spring block is produced, the diameter of their elements is much smaller. In this embodiment, the maximum circle size reaches only 20 mm, while the turns are not more than 8 pieces. Thus, one square meter of such a block has from 250 to 1200 springs. The shape of the elements resembles barrels.
The orthopedic effect is achieved by placing each spiral in a separate case, which ensures their independence from each other. Accordingly, when an individual spring is acted upon, the neighboring ones are not affected, which makes it possible to more evenly distribute the load over the entire surface.
Pocket Spring in mattresses
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 neededspecial fasteners in the corners, which will fix the product. There is also a frame that provides rigidity and resilience when exerting loads.
Such mattresses can also be used as a separate couch by equipping them with special furniture legs. External facing material - jacquard fabric.
The idea of a spring block
Such an element as a spring was invented a long time ago, but the Italian military came up with the idea of combining them into a single system. A similar design was used in Italy when sappers deactivated mines in the fields. After all, a spring block of independent configuration allows you to evenly distribute the load of the human body over the entire surface, and not on one specific area.
But not everyone agrees with this legend, although there is documentary evidence of those times.
Spring design features
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 butene spring block is called TFK, S-500 or EVS500. In this version, each element has its own cover. The average density is 220-300 springs per square meter. meter. Domestic products are 2-3 times cheaper than imported analogues, since the delivery of the latter is quite laborious. And all due to the fact that these products cannot be rolled up.
2. Springs of 20-40 mm are called S-1000 and S-2000. Small size allows you to increasethe number of springs per square meter, so it reaches 500-1000 pieces. This design is called anatomical, as it is able to more clearly repeat the silhouette. In addition, such springs allow you to evenly distribute the load on all parts of the surface. In comparison with the previous version, the rigidity will be higher, which allows you to expand the weight category of people.
Double springs
There are universal mattresses that combine small and large diameter springs. They are called "spring in a spring". In this embodiment, a narrower element is placed inside a wider one. At the same time, the rigidity of the latter is somewhat less than that of the former.
If an average load is placed on such a bed, then only large springs are deformed. As soon as the weight increases, the small ones will also come into play. This option is great for those who have a weight difference of more than 40 kilograms with their spouse.
Spring performance
Since mattresses are often made to order these days, manufacturers suggest customers consider the following additional options:
1. Gain. In this case, the spring block is designed for those who are overweight. The design can be reinforced by double wire or by creating a checkerboard pattern with springs. In the second case, they will fit more tightly to each other. In "Bonnel" mattresses, reinforcement occurs due to inserts from polyurethane foam inside the spirals.
2. Zone spring block. In this designthere are separately selected zones that have individual rigidity. They are arranged according to human anatomy. Since each part of the body has its own weight, when a person lies down on any surface, there is an unequal load on each area. Therefore, in order for the body to be maintained in the correct form, various stiffnesses are needed.
Zones can be 3, 5 or 7, depending on the mattress model. But not all manufacturers have this option.
3. half blocks. One of the longitudinal halves has stiffer springs, and the second has softer ones. This option is convenient for those couples in which one likes to sleep on hard, and the other on soft.
Fillers for mattresses
In most cases, the spirals inside have a soft upholstery. This is done so that the product is not strongly deformed when a person sits on the edge. A box is created inside the mattress, where there is an upper and 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 polyurethane foam is taken as the basis. Some manufacturers use a combination of these materials, which is extremely convenient, since the product is of medium hardness.
A little about sofas
For sofa designs, the same system is used as for mattresses. The only thing that is given more attention in this case is the filler, since the sofa is still more often designed for sitting, and not for lying. But that doesn't mean he has to beless comfortable.
The best option is when the furniture has both filler and springs. Today, polyurethane foam and a spring block for a sofa are considered the best duet. The price of these products is somewhat high, but this is all because such furniture has an orthopedic effect. The PU foam structure has good recovery ability, no weight limit. Also, this filler is well suited for those who suffer from allergies or asthma.
Another fairly popular and high-quality filler is latex. Since this is generally a first-class material, the price of such products will be even higher. If you purchase a quality product, you can not be afraid that during intensive use the springs will come out into the light. If the technology was observed during the production process, then between the spirals and the upper skin there are quite a lot of layers of various materials that hold the springs in place.
But nevertheless, spring blocks with dependent spirals are more common in sofas.
Varieties 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 variety is applicable in those headsets where there is only one or two soft sides, which are formed due to the unity of the flooring of the stable side.
2. Unilateral. In this version, the springs have a metal frame that encircles the entire working plane. It acts as a frame for the edges of which are attachedsoft floor materials. If the block is assembled by hand, then this element also helps to achieve the desired dimensional stability (for the block and the soft element). This option is applicable in one-sided soft elements.
3. Bilateral. This configuration of blocks differs in the number of frames, that is, there are two of them. Accordingly, their scope is where the furniture has two soft sides.
Regardless of the type of block, they are based on springs made of wire, for which, in turn, carbon steel is taken. With the right technology, each element can be tempered. This is done so that the metal stabilizes in its dimensions and hardens, otherwise during the operation of the product, bumps will appear on the surface 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 equipment or manually. It should be noted right away that in the first case, the products are of higher quality than in the second.
The production of hand-assembled spring blocks has the following steps:
1. In order to make two-cone springs, the base wire is first straightened, after which it is wound on special forms to get the spirals themselves. After that, knots are twisted on the main turns, and only then the elements can be heat treated.
2. The next step is the creation of fastening spirals, for which again the wire is corrected, and then the winding is carried out.
3. In order toto make a frame, straighten flattened tape or wire. After that, it is given the necessary shape and all the ends are connected together.
4. After the connecting spiral, the supporting coils of the springs are fixed to create a frameless block.
5. Connecting brackets are also made. This is called stamping.
6. Further, everything is connected into one structure, that is, the frame and springs are combined with brackets.
Of course, every step is carefully controlled. But with manual assembly, there is still a human factor, which sometimes negatively affects the quality of the block design.
As for automated production, the workshops have units of the G-65/SW series. Such machines do all the work themselves according to predetermined parameters.
Also, the manufacturer itself plays an important role. After all, a well-known brand will always keep its brand to the maximum, trying to create products of the highest quality. Therefore, it is worth giving preference to well-known manufacturers who have already successfully established themselves in the market.
