Method and device for refining particle board

FIELD: process engineering.

SUBSTANCE: invention relates to method and device for refining particle board. Method of refining particle board 2 with decorative finish on one of its sides comprises the following steps. (a) Cleaning particle board top and bottom surfaces. (b) Applying first top layer of pitch containing corundum particles on top surface and first bottom layer of pitch on bottom surface. (c) Drying top and bottom first layers of pitch to residual moisture of 3% to 6%. (d) Applying second top layer of pitch containing cellulose on top surface and second bottom layer of pitch on bottom surface. (e) Drying top and bottom second layers of pitch to residual moisture of 3% to 6%. (f) Applying third top layer of pitch containing glass particles on top surface and third bottom layer of pitch on bottom surface. (g) Drying third said layers to residual moisture content of 3%-6%, and (h) compacting layered structure at pressure and temperature.

EFFECT: perfected procedure.

14 cl, 3 dwg

 

The invention relates to a method of refining chipboard (particleboard), which at least on the upper side and/or bottom side has a decorative finish.

Particleboard this type are widely distributed and used in various fields. A particularly large field of application is their use as panels for flooring. Especially when such use is equipped with a decorative chipboard are primarily due to stepped on them, a serious load. In order to bear such a burden, the decorative layer should be covered with a protective layer. It consists of a synthetic resin, such as melamine resin, to which add various additives. Due to various printed on chipboard layers occur tensile stress (tension), which can lead to lateral buckling. Therefore, for the compulsory uniform manifestations of these forces on both sides and thereby prevent lateral buckling, both upper and lower side of the chipboard should be coated.

Applying a layer of synthetic resin on particleboard can occur in different ways. For example, it is known the application of synthetic resin in the form of a granulate or powder to be coated side of the chipboard and, if necessary, the powder under presado is. In the final pressing pressure and temperature caused the powder melts and forms a homogeneous layer. Naturally, in this method, two-sided coated chipboard impossible as poured the powder lies on the upper side of the particle Board and connected to it only by pressing.

From EP 1454763 A2 is known a protective layer of melamine resin on the decorative finish on the upper side of the chipboard. At the same time on the lower side of the chipboard should also be applied a protective layer of melamine resin. Thus superimposed layers of resin at the extrusion melt and, thus, to contain a decorative finish.

In EP 2098304 A2 describes the use of liquid resin, which is applied both at the top and on the bottom side of the chipboard.

Based on this formulation of the problem described method of finishing particleboard should be improved.

The problem is due to the method known type with the following stages:

a) cleaning the top surface and the bottom surface of the chipboard,

b) applying the first upper layer of resin, which contains corundum particles on the upper side and the first lower layer of resin on the bottom side of the chipboard,

C) drying the first upper resin layer and the first lower resin layer to a residual moisture content of 3% to 6%,

d) apply a second top coat of resin, which contains the separated cellulose, on the upper side and the second lower layer of resin on the bottom side of the chipboard,

d) drying the second upper resin layer and second bottom layer of resin to a residual moisture content of 3 to 6%,

e) applying at least a third of the top layer of resin, which contains glass particles on the upper side and at least a third of the lower layer of resin on the bottom side of the chipboard,

g) drying the third upper resin layer and the third lower layer of the resin to a residual moisture content of 3 to 6%,

C) compressing the layer structure under the influence of pressure and temperature.

By cleaning the top side and the bottom side of the chipboard on the first stage of the method safely removes dust, or other contaminants that were deposited during storage or prior stages of production on the respective sides of the chipboard. This is important in order to ensure that applied very thin layers of resin are applied evenly and homogeneity on the upper side and that these layers do not contain any irregularities or enabled.

Thanks corundum particles in the first upper layer increases the resistance of this layer to abrasion. This is very important, first of all, when using chipboard as flooring panels to ensure that they could withstand the aforementioned loads that affect sexual panel. When corundum is present, for example, is a mixture of normal silanizing corundum different granularity and can be simply added to the resin. On the lower side of the chipboard is applied to the first bottom layer of the resin, resulting in a compensated operating on the DSP through the first upper layer resin tensile strength. The first lower layer resin can be painted. In both layers of resin may be added additives such as hardeners, wetting or separating agent. Then the first upper resin layer and the first lower layer resin dried to provide pure overcoating resin. Drying occurs, for example, hot air, when the resin dries, and the reaction of the melamine crosslinking resin stops. The weight of the coating displays the water, and the residual moisture content is about 3-6%. Also the rest of the superimposed layers of resin proper drying brought to this residual moisture.

Cellulose, which has a second upper layer is present in standard fibers, which can also be added to be applying layers of resin. Embedded in the third top layer of glass is present in the form of beads. And they can simply be stored and to be entered in the drawing layer of resin. Affixed to the bottom side of the chipboard layers of resin can be painted. All layers of the resin may be added additives such as hardeners, wetting and separation is the means.

In the drying to a residual moisture content of 3 to 6% of the fusion process is applied layer of resin is stopped. In the final pressing pressure and temperature layers of the resin melt again, and the fusion process continues. This ensures that the individual resin layers are sewn together, not only in themselves but also between them and, thus, can be pressed in the large laminate. Normal korotkosrochnye press work, for example, at a pressure of from 30 to 60 kg/cm2, the temperature on the surface of the wood chips to about 165C. and the pressing time from 6 to 12 seconds. This put layers of melamine resin bound with the inclusion of decorative finishes. If you are using structured pressed sheets, in addition to decorative finishes in layers of resin can be extruded and patterns. They can be made largely congruent with decorative trim. In this case we are talking about matching embossed structures.

Preferably, the third upper layer resin contains 20% of the glass particles. For the second upper layer was favorable by approximately 5% cellulose. The first upper layer contains, first of all, 20% of corundum particles.

Preferably, the upper layers of the resin and lower layers of resin are applied in an amount of from 20 to 50 g/m2. Due to the fact that respectively nanasen the e on the top and the bottom layers of melamine resin applied in the same number, at the same time ensures that arise through the superimposed layers during drying tensile strength in particleboard mutually destroyed. Thus, emerging on the lower side of the chipboard protivostaianie exactly corresponds to the layer structure and the corresponding thickness of the layer applied PA upper side of the sequence of layers. Due to this small application quantity from 20 to 50 g/m2 at the same time ensures that, first of all, on the lower side of the chipboard does not generate flows.

The upper layers of the resin and lower layers of the resin may contain 60%solution of a synthetic resin.

Under the decorative finish to be improved DSP can be applied primer and primer. Decoration was napechatana on this primer and covered with a coating. As an alternative, the decorative finish may be applied to the DSP in the form of a glued layer of decorative paper.

Device for manufacture of particle Board, with at least one of the upper side and/or one lower side of the chipboard has a decorative finish, according to the invention contains the following:

a) a first device for applying double-sided coating,

b) located in the direction of processing for the first device for applying two-sided coating of the first drying device,

C) located in healthy lifestyles the research Institute of processing for the first drying device, a second device for applying double-sided coating,

g) located in the direction of the processing for the second device for applying two-sided coating of the second drying device

d) at least one located in the direction of the processing for the second drying device third device for applying double-sided coating,

e) at least one location in the process direction for at least one third device for applying a third drying device and

W) korotkoosty press,

each device for applying two-sided coating contains top device for applying a layer of resin on the top side of the chipboard and the bottom device for applying a layer of resin on the bottom side of the chipboard, and each upper device for coating and each lower device for coating comprises a mixing tank, in which, respectively, subject to application of the resin is mixed with at least one additive.

In such a device is entered provided with a decorative finish to be improved with chipboard. In at least three devices for applying double-sided coating the top and bottom sides of the chipboard simultaneously covered with the resin layer. This reduces manufacturing time and thus reduces production costs. Thanks prescribed for what tristani for applying double-sided coating and drying devices, which just covered with resin particleboard dried to the desired residual moisture content of, for example, hot air, quickly provides the possibility of applying respectively the first layer of resin, and in advance interrupted the process of crosslinking the applied layer of resin. Intermediate storage of the coated resin particleboard for drying layers of resin or overturning of chipboard for the coating and on the other side is no longer required.

Due to the fact that as each top device for coating and each lower device for coating has a mixing tank in which, respectively, subject to application of the resin is mixed with the desired additives, it is possible first of all to make a quick adjustment in both directions between different product requirements, such as desired class abrasion. The need for long-term change or the content of the willingness of large quantities of various mixtures of resins and additives disappears. Due to this significantly decreases the amount of content in readiness amount of material, and occupied by the installation area. At the same time quickly and easily can happen reconcile the different product properties, such as smoothness of the surface kislotostojkuju or resistance to abrasion. In addition, a possible application is the reactive resin mixtures, since you no longer need staging covered with resin particleboard, and there is a continuous process. Due to this also obviously reduces the time quantum corotating press, resulting again reduces the cost of manufacture.

The device according to the invention preferably has a cumulative battery with multiple receivers, which is subject to application of the resin and additives are stored separately from each other, and the supply lines from the receivers to the mixing tanks. According to him resin and additives can be fed into the mixing tanks separately from each other and only there to mix in the desired subject to application of the resin layer.

First of all, the device may have a control unit, which is arranged so that it controls the amount of supplied through the inlet pipes into the mixing tanks resins and additives. Thus, it is possible to automatically reconcile the different product properties and quantities of the applied resin or additives.

In addition, each of the top device for coating may be causing buckling. This ensures continuous and accurately controlled thickness. In addition, the thus applied layers are applied very uniformly and evenly.

To discharge the contents of the mixing rez is rowrow in the respective top and bottom of the device for coating can be provided hose pumps. Due to this, the service life is increased up to 20 times compared with the use of diaphragm pumps. In addition, hoses, hose pumps with quick change systems if necessary, can be simply and quickly replaced, resulting in significantly reduced time for maintenance and repairs.

Before each device for applying two-sided coating may preferably be set at least one clamp for particleboard. With it can be eliminated resulting in certain circumstances deformation of particle Board, and subject to cover chipboard can be accurately summed to the appropriate device for applying two-sided coating.

For transportation chipboard inside the device uses a transport device with acute-angled elements in the form of transport chains with sharp items that are durable and not prone to damage and ensure the high quality of the surface is covered with resin particleboard. Acute-angled elements can be automatically cleaned by the cleaning brush.

The transfer of chipboard from the device for applying the double-sided coating on the transport chain and Vice versa takes place through the roller washers. At the entrance to a device for applying two-sided coating or drying device additionally used is described already described clamps in the form of a roller washers.

Device for manufacture of particleboard can additionally have other devices for applying double-sided coating, which can be increased layer thickness, and the number and content of functional additives. Thus can be manufactured products that can be declared for a higher class use. The same applies to the method according to the invention, in which the upper and lower side to be coated chipboard can also be applied to more than three layers of resin.

If the control device described here uses electric, primarily computer controlled, the control system, it is possible to achieve high reproducibility of the applied layer of resin, as content in the mixture of resin and additives, and devices for temperature control, for example a drying apparatus and corotating press, are controlled automatically. Due to this is achievable with a high level of quality of the manufactured products. In addition, by regulating the quantities of deposited resin on the upper and/or lower side can be automatically compensated in various States of curvature to be coated chipboard, which may result from the application of different primers and decorative layers.

Next con is reconstructive example device according to the invention is explained in more detail on the drawings. Shown:

1 is a schematic top view of a constructive example of the device according to the invention,

2 is a schematic top view of a device for applying double-sided coating,

3 cut along line a-a in figure 2.

Figure 1 shows a device according to the invention in a schematic top view. Be improved DSP 2 in figure 1 are introduced into the device in the top right. First, in a clearing device 4 are cleaned top and bottom sides of the DSP 2. Then DSP 2 served on the first device 6 for applying double-sided coating. The first device 6 for applying double-sided cover has an upper device 8 for applying the coating and the lower device 10 for applying the coating, which shows a constructive example made in the form of causing rollers. In these deals rollers on the upper side and the lower side to be coated chipboard is covered with a layer of resin.

After DSP 2 pass through the first device 6 for applying double-sided coating, they reach the first drying device 12. Here applied in the first device 6 for applying double-sided coating resin layers are dried to a residual moisture content of 3 to 6%.

Due to space constraints and reasons of clarity, a second device for applying two-sided coating in figure 1 is not shown. It is the process direction V, which figure 1 is indicated by a small arrow adjacent to the first drying device 12.

Figure 1 in the direction of V processing should the device 14 for applying double-sided coating. It is made identical to the first device 6 for applying double-sided coating. After DSP 2 passed third device 14 for applying double-sided coating, in the third drying device 16 applied in the third device 14 for applying double-sided coating resin layers are dried to a residual moisture content of 3 to 6%. Then particleboard are indicated in figure 1 only as quadrilaterals processing stations intermediate stacking 18, pressing in corocotta press 20, as well as station 22 quality control.

As the first device 6 for applying double-sided coating, and a second device 14 for applying double-sided coatings have respectively two mixing tank 24, one of which is attached to the upper device 8 for applying the coating, and the other the lower device 10 for coating. In these mixing tanks 24 to be applying in the respective devices 8, 10 for coating the resin is mixed with the desired additives.

These additives are stored separately from each other in a cumulative battery 26. Each of these storage units 28 through the dive torches etc is ASCII pipe 30 is connected to the mixing tank 24. These inlet pipes 30 desired additives are fed into the mixing tanks 24.

The number of individual additives in figure 1 is regulated by an electric control unit 32, which is on the lines 34 control connected with cumulative battery 26 and the mixing tanks 24. This achieves a high level of quality and a high reproducibility of the deposited layers of resin.

Figure 1 as the first device 6 for applying double-sided coating, and the third device 14 for applying double-sided coating installed on the rails 36. The same applies to all the devices for applying the double-sided coating. Thus they can be nominated and later again pushed for maintenance or repair, or if they are not required for the desired application layers.

Figure 2 shows a schematic top view is shown in figure 1, the device 6, 14 for applying double-sided coating. DSP 2 is fed in the direction V of the processing device 6, 14 for applying double-sided coating. Shows the device 6, 14 for applying double-sided cover has an upper device 8 for applying the coating, which in figure 2 is made in the form causing rollers. The same applies to the lower device 10 for applying the coating, which in figure 2, as already in figure 1 is not shown. Give the TWT 6, 14 for applying double-sided coating in figure 2 has two mixing tank 24, from which the right is attached to the upper device 8 for applying the coating. With the help of the mixing device 38 is made desirable for the upper device 8 for coating a mixture of synthetic resin and additives. Not shown on the inlet piping of the additive to the mixture from the storage tank 28 storage battery 26 in figure 1 are supplied into the mixing tank 24. With the help of sensors 40 are shown as level and temperature of the mixture. Mixed in the mixing tank 24 material via a peristaltic pump 42 through inlet pipes 44 is fed at the top of the device 8 for applying the coating.

Figure 3 shows a section along line a-a in figure 2. Upper device 8 for applying the coating and the lower device 10 for coating made in the form of causing rollers, which are respectively geared to the roller 46 and the metering roller 48. Along the inlet pipes 44, which in figure 3, and figure 2 is equipped with an arrow on the end, mixed in the mixing tank 24 to be application material is introduced between the causing the roller 46 and the metering roller 48. Causing the roller 46 is applied on the upper side or the lower side of the DSP 2. The protractor is the WHC particleboard happens as before, and device 6, 14 for applying double-sided coverage through the so-called transport device 50 with acute-angled elements. Due to the fact that the device 50 has only a small, very small surface area of the point of contact with the particle Board 2, provided good quality already covered chipboard. Separate acute-angled elements 52 are cleared automatically by means of brushes 54.

To ensure reproducible and accurate filing DSP 2 device 6, 14 for coating, before and after the respective devices 8, 10 for coating can be installed clamps 56.

This ensures that the layers on the upper and lower sides of the DSP 2 can be applied in a reproducible manner and accurately.

Figure 1-3 not shown, other devices for applying double-sided coating is made structurally the same. Shown in figure 1 rails they can be simply and cost-effectively introduced into the production line or withdrawn from it. And due to this it is also possible simple and rapid re-equipment of the device at the elevation particleboard with other layers structure.

REFERENCE DESIGNATIONS

2Particleboard (chipboard)
4 The treatment device
6The first device for applying two-sided coating
8The top device for coating
10The bottom of the device for coating
12The first drying device
14The third device for applying two-sided coating
16Third drying device
18Station intermediate stacking
20Korotkoosty press
22Station quality control
24Mixing tank
26The cumulative battery
28Storage tank
30The lead pipe
32Electric unit UE is Alenia
34Managing line
36Rails
38The mixing device
40Sensors
42Hose pump
44The supply line for material
46Causing the drum
48The metering roller
50Transport device with acute-angled elements
52Sharp
54Cleansing brush
56Clamp
VThe direction of processing

1. Method of refining chipboard (particleboard) (2), which has at least on the upper side and/or bottom side of the decorative trim, which includes the following stages: (a) cleaning the top side and the bottom side of the DSP (2), (b) the application of the PE the first upper layer resin, which contains particles of corundum, on the upper side and the first lower layer of resin on the bottom side of the DSP (2), (C) drying the first upper resin layer and the first lower resin layer to a residual moisture content of 3% to 6%, (d) apply a second top coat of resin, which contains cellulose, on the upper side and the second lower layer of resin on the bottom side of the DSP (2), (e) drying the second upper resin layer and second bottom layer of resin to a residual moisture content of 3% to 6%, (e) application at least a third of the top layer of resin, which contains particles of glass, on the upper side and at least a third of the lower layer of resin on the bottom side of the DSP (2), (g) drying the third upper resin layer and the third lower layer of the resin to a residual moisture content of 3% to 6%, (C) compressing the layer structure under the influence of pressure and temperature.

2. The method according to claim 1, characterized in that the third upper layer resin contains about 20% glass.

3. The method according to claim 1, characterized in that the second upper layer resin contains about 5% cellulose.

4. The method according to claim 1, characterized in that the first upper layer resin contains about 20% corundum particles.

5. The method according to one of claims 1 to 4, characterized in that the upper layers of the resin and lower layers of the resin is applied in an amount of from 20 to 50 g/m2.

6. The method according to one of claims 1 to 4, characterized in that the upper layers of the resin and lower layers of the resin containing 60%solution of a synthetic resin.

7. The method according to claim 1, characterized in that under the decorative finish to be improved with DSP (2) was applied primer and primer decorative finish was napechatana on primer and covered the floor.

8. The method according to claim 1, characterized in that the decoration has been applied to the DSP (2) in the form of a glued layer of decorative paper.

9. Device for manufacture of particle Board (2), at least the upper side and/or bottom side particle Board (2) has a decorative finish, with (a) the first device (6) for applying the double-sided coating, (b) located in the direction (V) processing for the first device (6) for applying bilateral coating drying device (12), (b) located in the direction (V) processing the first drying unit (12) a second device for applying bilateral coverage, (g) located in the direction (V) processing for the second device for applying bilateral covering the second drying device, (d) at least one located in the direction (V) processing the second drying device to a third device (14) for applying double-sided coating, (e) at least one located in the direction (V) processing the third device (14) for applying two-sided coating of the third drying device (16), and (g) karadottir press (2), each device for applying two-sided coating contains the upper device (8) for applying a layer of resin on the upper side of the DSP (2) and the lower device (10) for applying a layer of resin on the bottom side of the DSP (2), and each of the upper device (8) for coating and each of the lower device (10) for coating are respectively the mixing tank (24), which is subject to application of the resin is mixed with at least one additive.

10. The device according to claim 9, characterized cumulative battery (26) with several reservoirs (28), in which separate from each other are stored subject to application of resin and additives, and the connecting pipelines (30) from storage tank (28) to the mixing tanks (24).

11. The device according to claim 10, characterized by the control unit (32), which is intended to regulate the quantity supplied through the inlet pipes (30) in the mixing tanks (24) resins and additives.

12. The device according to claim 9, characterized in that each of the upper device (8) for coating and each of the lower device (10) for coating are causing buckling.

13. The device according to claim 9, characterized hose pump (42) for discharge of the contents of the mixing tank (24) to the upper device (8) to grease the cover and the bottom of the device (10) for coating.

14. The device according to claim 9, characterized in that before each device for applying two-sided coating has at least one clamp (56) to the DSP (2).



 

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EFFECT: the invention ensures production of decorative tiles with a grainy coating.

4 cl

FIELD: decorative-lining sheet material for producing of material simulating natural or artificial stone or various kinds of wood.

SUBSTANCE: method involves providing thermal vacuum forming of thermoplastic sheets having thickness of 0.5-8 mm and comprising on its face side decorative-protective polymeric film.

EFFECT: wider range of decorative and lining materials and increased efficiency in simulating structure of natural or artificial materials.

2 cl, 1 dwg

FIELD: ceramic decorations.

SUBSTANCE: method of making ceramic decorative art wall panel comes to the following: tiles are placed on backing secured vertically with tilting of 10-15° successively, starting from lower horizontal row, tiles of which are placed on corresponding limiting step of backing.

EFFECT: improved quality of wall panels.

5 cl, 1 tbl, 4 dwg

FIELD: construction industry; methods of manufacture of the architectural-decorative products.

SUBSTANCE: the invention is pertaining to the method of manufacture of the architectural-decorative products. To increase the quality the products the method provides for laying of the color mixtures in the mold for casting of the product is conducted with usage of a vibration process on the vibration exciter.

EFFECT: the invention allows to improve quality of manufacture of the architectural-decorative products.

6 cl, 3 dwg

FIELD: papermaking.

SUBSTANCE: pre-impregnate is manufactured by impregnation of crude paper with thermosetting formaldehyde-free resin until content thereof 10 to 70%. Residual moisture content in pre-impregnate is 2-3%. Resin contains: at least one radical-polymerization polymer with less than 5% of α,β-ethylenically unsaturated mono- or dicarboxylic acid; at least one radical-polymerization polymer containing more than 5% of α,β-ethylenically unsaturated mono- or dicarboxylic acid; and at least one alkanolamine with at least two hydroxyl groups; or resin contains at least one radical-polymerization polymer with 5-100%, particularly 5-50%, or more particularly 10-40% of α,β-ethylenically unsaturated mono- or dicarboxylic acid and at least one above alkanolamine.

EFFECT: improved quality of surface, printing properties, delamination resistance, and varnishing capacity.

16 cl, 3 dwg, 2 tbl, 2 ex

FIELD: construction industry; domestic appliances; electrical engineering; motor-car industry; methods of production and application of the laminated composite materials with the different layers of a resin.

SUBSTANCE: the invention is pertaining to the method of production and application of the laminated composite material with the different layers of a resin and may used in construction industry, domestic appliances, electrical engineering, motor-car industry. The laminated composite material contains the carrier made out of the thermoplastic polymeric compound, the located on it intermediate layer also made out of the thermoplastic polymeric compound and the applied on the intermediate layer of the thermoreactive layer. Between the carrier and the intermediate layer there is a layer of the resin (a) with the rate of consolidation of at least 20 %. Between the intermediate layer and the thermoreactive layer there is the layer of the resin (c) with the rate of consolidation of at least 60 %. The materials of the layers are laid as the flat sheets and at the temperature of 150-300° C link to the carrier. The material possess the high degree of stiffness and impact toughness, the high quality of the surface, the fast and easy solidification.

EFFECT: the invention ensures the high degree of stiffness and impact toughness, the high quality of the surface, the fast and easy solidification.

13 cl, 1 ex

FIELD: construction materials industry; production of the moldable decorative laminated material.

SUBSTANCE: the invention is pertaining to the moldable complicated decorative laminated material, which contains the polymer impregnated decorative layer made out of the bilateral expansible decorative paper and the core polymer impregnated layer formed out of the bilateral extendable kraft-paper. The laminated material is used for production of the different products requiring the molding concerning the surface of the complicated form, in particular, to the packet made out of the laminated material. The board made out of the laminated material has the moldable base in addition to the decorative layer. The method of manufacture of the moldable decorative laminated material includes the following operations: treatment of the decorating paper, its impregnation, the treatment and impregnation of the kraft-paper, the layer by layer stacking and joining of the layers of the decorative and kraft-paper under pressure with their preliminary impregnation with the phenol-formaldehyde polymeric compound. The technical result of the invention is improvement of the surface properties of the decorative laminated material.

EFFECT: the invention ensures improvement of the surface properties of the decorative laminated material.

37 cl, 8 dwg

FIELD: construction.

SUBSTANCE: method comprises applying a lining material on the surface of the panel, gluing the lining material to the surface of the panel, pressing, and conditioning. Before applying the lining material, the panel is dampened and treated with steam. Pressing is performed at a temperature 127-132°C and at a pressure of 170 bar for 4-6 min.

EFFECT: enhanced efficiency.

3 cl

FIELD: manufacture of decorative panels.

SUBSTANCE: prior to delivery of PVC blank to working area, its surface is subjected to loosening for increase of surface activity and for enhancing adhesion by applying solution of primer; use is made in working area of contra-shaft for holding-down the blank to drive guide transporting wheels and for rolling-on the facing material and connecting it with front surface; used as hold-down device is hold-down shaft with its own program-controlled shaft which is made from soft elastic material for copying the configuration of front and side surfaces of blank at the moment of connection with facing material at simultaneous stretching of it for avoidance of folds; its longitudinal axis is located at angle of from 0 to 90° relative to delivery of blank.

EFFECT: improved quality of facing; simplified construction of device; increased productivity of process.

5 cl, 3 dwg

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