The Sofa Inspection Standard Is Not As Simple As You Think.

Sofa is one of the furniture that we often come into contact with in our daily life, so how do you know what kind of inspection the sofa needs before entering the mall? What is the sofa inspection standard?

The sofa is made of various materials, so how to better judge the quality of the sofa, first of all, we must judge the type of sofa, classify it according to the standard, and check and accept sofas with different specifications and shapes.

Sofa Inspection Standards-Product Classification

(1) according to the seat surface elastic material classification

① Concave spiral spring sofa: the sofa made of concave spring and foam plastic is the main elastic material of the seat surface.

② Snake-spring sofa: the sofa whose seat surface is mainly made of snake spring and foam plastic.

③ Sponge sofa: the sofa made of elastic bandage and/or foam plastic is the main elastic material of the seat surface.

④ Hybrid spring sofa: the main elastic material of the seat surface is the seat surface spring composed of concave spiral spring, snake spring and other springs.

Core, sofa made of foam plastic.

(2) Classification according to coated fabrics

① All-leather sofa: except the bottom of the sofa seat, the sofa is covered with natural animal leather.

② Main parts of leather sofa: sofa seat, front of backrest, upper edge of backrest, inner side of armrest and upper edge of armrest are all made of natural materials.

Leather-covered sofa.

③ Artificial leather sofa: sofa covered with artificial leather.

④ Recycled leather sofa: sofa covered with recycled leather.

⑤ Fabric sofa: a sofa covered with wool, linen, cotton and other textile fabrics.

(3) according to the sofa skeleton material classification

① Wood skeleton sofa: sofa with wood or various wood-based panels as the main skeleton material.

② Metal skeleton sofa: sofa with metal or metal and wood as main skeleton materials.

③ Skeletonless sofa: The whole sofa products are all made of soft materials such as foam plastics.

(4) Classification according to use function

① Single-use sofa: sofa with sitting function only,-general can not be marked.

② Dual-purpose sofa: a sofa with sitting and lying functions.

③ Three-purpose sofa: a sofa with the functions of sitting, lying and storing things.

(5) Classification according to seat front width

① single person sofa: Sofa for single person.

② Sofa for two people: a sofa for two people to sit on.

③ Sofa for three people: a sofa for three people.

④ Combined sofa: a sofa made up of a plurality of monomers, which can be arranged into a certain shape for many people to sit on.

Second, sofa inspection standards, product marking

Sofa Inspection Standards-Marking Is An Essential Part

(1) Composition of product marks

The product mark consists of the following parts, which are arranged in order: covering material, elastic material, skeleton material, seat front width, function and sofa model.

(2) Examples of marks

① The main parts are covered with pigskin, with snake spring structure and sponge, combined single use, wooden skeleton, and the sofa with the model of 98A defined by the enterprise:

The main part of the pigskin snake spring wood skeleton combination sofa.

② Three-person dual-purpose wooden frame sofa covered with wool and hemp blended fabric, with sponge bandage structure and self-defined model of 98B;

Wool sponge wood skeleton sofa for three people.

Sofa Inspection Standards-Material Requirements

There is no limit to the internal tree species, but it should comply with the provisions of 4.3.5,4.3.6 and 4.3.8~4.3.10 in GB/T 3324- -1995. Old wood should be planed before it can be used. Paying attention to materials is one of the important factors of sofa quality and one of the most important parts of sofa inspection standards.

(1) Materials for external wooden parts

① In a product or a set of products, the wood of the same tree species should be used, the color and texture of the wood should be similar, and needles and broadleaf wood should not be mixed.

Use.

② Wood with through cracks, worm-eaten, decaying, dead knots, resin bags and other defects shall not be used, and the twill degree of twill wood exceeds 20%.

May not be used.

③ Other minor material defects, such as cracks, blunt edges, etc., can be repaired without affecting the structural strength and appearance of the product.

Use, without repair processing shall not be used.

④ The moisture content of wood should be in line with the annual average moisture content of wood in the area where the product is located. W: W-1% for Grade A; Class b is w; Class c is

W+1%。

When the distribution unit or group ordering unit has other requirements for the moisture content of the technical materials, it should be clearly stated in the contract.

Metal piece material

⑤ Ordinary carbon cold-rolled strip steel, ordinary carbon steel and low-alloy steel sheet used in the products shall meet the requirements of relevant standards.

Please.

⑥ The wall thickness of all kinds of round pipes and special-shaped pipes of stress parts shall be no less than 1.2mm.

⑦ There are no cracks and overlapping seams in all kinds of pipes, and there are no dislocations in pipe butt joint.

⑧ The performance of all kinds of spring steel should be no less than 65Mn steel or 70 # steel.

Pet-name ruby linen felt (cloth), cotton felt, cotton tire, brown felt and other padding materials should be dry, sanitary, no curtain rot, no sediment and metal impurities, and are not allowed.

Use waste padding. If recycled padding is used, it should be clearly indicated in the product logo.

(2) coating fabric

① Leather parameters should meet the requirements of relevant standards.

Test item thickness, tear strength, elongation at break, color rubbing fastness and coating adhesion fastness.

② Artificial leather and textile coated fabrics such as cotton, wool and hemp suitable for sofa should meet the requirements of qualified products of corresponding standards.

(3) Physical and chemical performance requirements of paint film coating and electroplating layer

(4) The physical and chemical properties of the paint film on the surface of wooden pieces shall meet the requirements of relevant regulations.

(5) Physical and chemical properties such as baking paint, plastic spraying and electroplating on the surface of metal parts shall meet the requirements of relevant regulations.

(6) Seam strength requirements of coated fabric

The separation degree of splicing seams of various coated fabrics: Grade A is not more than 5mm, Grade B and Grade C are not more than 6mm.

Sofa Inspection Standards-Product Appearance And Sensory Requirements

Sofa is mainly furniture that is in direct contact with human body and used for a long time, so it is very important for the appearance and sensory requirements of products. It is also one of the most intuitive means for inspectors to judge the quality of sofa, and it is also an

Sofa Inspection Standards-Indispensable Part

(1) Abnormal sound: press the front and back of the seat with bare hands, and there should be no abnormal metal friction and impact.

(2) Textile fabric: the spliced fabric pattern should be complete, the pile direction of the pile should be consistent, and the fabric should have no obvious color difference; The fabric should be free of scratches, colorless stains and oil stains; The fabric should be free of defects.

(3) Leather and artificial leather or recycled leather fabrics: Leather, artificial leather or recycled leather fabrics should have no color difference, no crack, damage or greasy feeling on the surface.

(4) Sewing and coating:

There is no stitch jumping and no obvious floating line. The embedded line should be smooth and straight, with no outer eel thread ends;

Round corners should be uniform and symmetrical;

The exposed bubble nails shall be arranged neatly, with basically equal spacing, free from loosening and falling off, obvious flattening, paint stripping and other defects;

Covered fabrics of various materials should be flat and full, with uniform elasticity, and no wrinkles or other defects are allowed; The technological crease lines should be symmetrical and uniform, and the levels should be clear;

Sofa Inspection Standards-Safety

(1) Exposed metal parts shall be free of cutting edges and burrs.

(2) In addition to the space between the seat surface and the armrest or backrest, people with bare hands should have no cutting edge and burr.

(3) When the sofa is in normal use, no sharp metal objects should pierce the seat surface and back surface.

(4) Wood structure technology

(5) The wooden parts inside the sofa should be planed, and the combination should be firm without looseness. No cracking defects are allowed. .

(6) The surface of the external wooden parts of the sofa should be clean, free from gnawing, gouging, cross stubble, reverse grain, groove and mechanical damage, and the hand feel should be free of burrs.

(7) The appearance of wooden pieces should be chamfered, rounded corners, radians and lines should be symmetrical and even, straight and smooth.

(8) The materials, textures and colors of symmetrical parts of wooden pieces should be similar.

(9) The linear shape of wooden parts should be-caused, concave and convex steps should be symmetrical, symmetrical parts should be symmetrical, turning lines should be clear and smooth, and no knives are allowed.

Marks, sand marks and other defects.

Sofa Inspection Standards-Metal Structure

(1) Out-of-roundness of the bent part of the external metal pipe of the product: the out-of-roundness of the round pipe with diameter less than 25mm should be no more than 2mm, and the diameter should be no less than.

The roundness of a 25mm round pipe should be no more than 2.5mm, the difference between the wrinkles at the bend of the round pipe should be no more than 0.4mn, and the bend is arc-shaped.

It should be smooth and consistent.

(2) There should be no slag inclusion, blowhole, flash, welding wire head, undercut and splash at the welding place of external metal parts of the product, and no desoldering, virtual welding,

Wear.

(3) Rivets at the riveted parts of metal parts should be straight and smooth, without obvious hammer marks and burrs, and there can be no missing riveting or riveting.

Sofa Inspection Standards-Paint Film Coating And Electroplating Layer Appearance

(1) The paint film coating on the surface of wooden parts shall be free from obvious sagging, bubbling, wrinkled skin, paint leakage, edge swelling, excessive stare blankly, powder accumulation and slag, bristles, burrs and

Color difference.

(2) The baking paint and spray coating of metal parts shall not be exposed, bumpy, wrinkled, flying paint, color difference and sagging.

(3) There shall be no scorch, exposure, pinholes, spots, scratches and burrs on the plating surface of the electroplated parts.

(4) The paint film of wooden parts should be free of sticky paint, the baking paint and spray coating of metal parts should be free of sticky paint and peeling of paint film, and the plating layer of electroplated parts should be free of cracks and peeling.

And rust return.

Sofa Inspection Standards-Hardware Accessories And Decoration Installation

(1) hardware fittings installation should be correct, tight and firm, and there should be no few pieces. Screws should not be screwed in the hardware installation hole, and there should be no burrs.

The use of moving parts should be flexible.

(2) All kinds of decorative parts should be installed tightly and firmly, without looseness, and the installation should be correct and symmetrical.

(3) The metal parts inside the product and various types of springs and hardware fittings shall be treated with rust prevention, without rust.

Sofa Inspection Standards-Test Methods And Experimental Items

(1) main dimensions

The main dimension inspection of the product shall check whether the design dimension marked on the drawing conforms to the provisions .

(2) Size limit deviation

① A 3m steel tape measure with an error of 0.6mm per meter should be used to measure the size of the product and compare it with the design size marked on the drawing.

The difference is the limit deviation.

② The symmetry degree of the seat and the back is to measure the length of two diagonals of the seat and the back respectively, and then calculate the diagonals respectively.

Difference.

③ The thickness difference of the surrounding edges is to measure the thickness of the corresponding surrounding edges on both sides of the sofa symmetry axis, and then calculate the thickness of the corresponding surrounding edges.

The difference.

④ the symmetry of armrests is to measure the length of two diagonals of a quadrilateral by taking the front faces of two armrests as the opposite sides of the quadrilateral.

Size, and then find the diagonal difference, which is the difference of handrail symmetry.

⑤ The height in front of the seat means that a circular cushion block with a diameter of 100mm is placed on the center line of the sofa seat surface, so that the side of the cushion block is flush with the front edge of the sofa. Right

Place the cushion block at the front edge of the sofa seat just where it won’t fall off at the arc front edge, and apply 75N force vertically downward through the cushion block (including the cushion block from

Weight), measure the distance between the pad surface and the horizontal ground and subtract the pad thickness to get the height in front of the seat (see Figure 2).

(3) Moisture content of wood

Use a wood moisture meter with an accuracy of 2%. Choose three parts at the part of the sample more than 100mm above the ground, and each part measures three points.

Calculate the arithmetic average value of each component, and the reading is accurate to 1%. Take the maximum average value as the measured value of wood moisture content.

(4) Foamed plastics

Measurement of apparent (volume) density, tensile strength and compression set.

(5) Physical and chemical properties of sofa leather fabric

Thickness, tear strength, elongation at break, color rubbing fastness and coating adhesion fastness are measured according to GB/T 4698. 20, and the sampling position is the seat of the specimen! Back.

(6) Durability

The durability test of products is determined according to relevant standards.

(7) Physical and chemical properties of paint film coating/electroplating layer

① The physical and chemical properties of the paint film on the surface of wooden parts are in accordance with GB/T 4893.4, GB/T 4893.6, GB/T 4893. 7.GB/T 4893.8,

GB/T 4893.9 for determination.

② The physical and chemical properties of baking and plastic spraying on the surface of metal parts shall be determined according to 5. 12.1 in GB/T 3325-1995.

③ The physical and chemical properties of electroplated layer on the surface of metal parts shall be determined according to 5.12.2 in GB/T 3325-1995.

(8) the degree of fabric seam detachment

The seam detachment degree test of the product fabric is determined according to the relevant standards.

(9) Unevenness of the product’s foot on the ground.

The size of the flat plate should be no less than 2200mmX 1200mm, the height is not limited, and the front surface is no more than 0. 5mm. Place the sample on the flat plate and collect it.

Measure the distance between the bottom of the foot and the surface of the flat plate with a feeler gauge.

(10) Stiffness of wood skeleton

Pick up a front landing point of the surgical skeleton sofa to the specified grading index height, and then check the other-

If the seam between the first landing point and the ground is poor, it can be judged that the classification index of this inspection item is qualified.

(11) product appearance and senses

Product appearance and sensory inspection should be in natural light or similar natural light (such as 40W fluorescent lamp), with a visual distance of 700mm ~ 1000mm, and the visual distance of 3

People together, with most of the same conclusion as the evaluation basis.

Sofa Inspection Standards-Signs, Packaging, Transportation And Storage

(1) sign

The product should have a permanent trademark or factory nameplate. Products should also be marked in the form of “product quality guarantee” in Chinese.

① The product logo must include the following contents:

Name and address of the manufacturer; Product marking; Main technical parameters of products; The quality grade and the product standard number executed by the enterprise; Three guarantees.

② The main technical parameters of the products on the sign must include the following contents:

Name of coated fabric; Name of bedding materials in each village; Density, tensile strength and 75% compression set of the foam; Moisture content of wood used; The number of durability tests.

(2) Packaging

When necessary, the product should be packed to prevent the product from being damaged in transit. Products with outer packaging shall be marked with product marks.

And the name and address of the factory.

3) Transportation

Products without outer packaging should be padded and covered during transportation to prevent product damage and exposure to the sun and rain.

(4) Storage

During storage, the product should be kept ventilated and dry; When stacking, padding should be added, and the storage place should conform to the environment conditions for crystal production, so as to prevent

Stop pollution and exposure to the sun and rain to prevent the product from being damaged.

The above is the related content of sofa routine inspection. If you want to better understand the quality of sofas, you should not only know the inspection standards of sofas, but also know the sofa production process and the common sofa bad reviews . You can click our official website to learn more about the industry.

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