RO128376A2

RO128376A2 - Sandwich-structured panel and process for making the same

Info

Publication number: RO128376A2
Application number: ROA201101128A
Authority: RO
Inventors: Petrică Lucian Usurelu
Original assignee: Petrică Lucian Usurelu
Priority date: 2011-11-10
Filing date: 2011-11-10
Publication date: 2013-05-30

Abstract

The invention relates to a sandwich-structured panel and to a process for making the same, intended to be used in the furniture industry. According to the invention, the panel comprises a laminated chipboard (3), combinations of one or more chipboard layers whereon there is attached by adhesive an expanded polystyrene sheet (2) over which a fibreboard (1) or chipboard is finally attached. The claimed process for making a sandwich panel relates to the manner of combining the layers and attaching the components, attaching the layers with polyvinyl adhesive in cold dispersion to obtain an elastic sizing, resistant to dimensional variations, in two stages, where, in the first stage the adhesive layer of uniform thickness is applied onto the sizing surface, after which the time interval of 10...15 min of the adhesive open phase is observed, during this period the parts to be subjected to sizing being not put in contact and, in the second stage the surfaces with the adhesive are put in contact by overlapping and subjected to pressure, in this stage there taking place the chemical hardening of the adhesive after which the sized parts are stacked and left to rest for 12...24 h, in order to allow the finalization of the adhesive hardening during a conditioning period, followed by finishing and ameliorating the panels by lining and edging with various decorative foils, in industrial technological lining and edging lines with suitable adhesives.

Description

PANOU CU STRUCTURA TIP SANDWICH SI PROCEDEU DEREALIZAREĂPANEL WITH SANDWICH TYPE STRUCTURE AND REALIZATION PROCEDURE

ACESTUIA.ITS.

Invenția se refera la un panou sandwich utilizat in industria mobilei si la procedeul de realizare a acestuia.The invention relates to a sandwich panel used in the furniture industry and to the process for making it.

Sunt cunoscute panouri tip sandwich utilizate in industria construcțiilor cum ar fi US 4053667-A; 4471609; 4557440-A; 4735841-A; sau RO117976, la care ar fi posibila realizarea fetelor de lucru simultan cu panoul, daca ciclul termic necesar întăriri preimpregnatelor este același cu al filmului adeziv. Datorita faptului ca grosimile fetelor de lucru sunt mai mari decât ale filmului adeziv este necesara menținerea temperaturii de întărire un timp mai mare si este greu de realizat.Sandwich panels used in the construction industry such as US 4053667-A are known; 4471609; 4557440-A; 4735841-A; or RO117976, in which it would be possible to make the work faces simultaneously with the panel, if the thermal cycle required for pre-impregnation of the impregnation is the same as that of the adhesive film. Due to the fact that the thicknesses of the working faces are higher than those of the adhesive film, it is necessary to maintain the curing temperature for a longer time and it is difficult to achieve.

Alte procedee propun variante de realizare a fetelor de lucru înaintea fabricării panoului, cum ar fi brevetul EP 0628406A, care prezintă un panou tip sandwich din materiale compozite, fabricat cu tehnica autoclavizarii, la care suprafața de lipire este mărită prin utilizarea unui strat expandabil introdus in celulele miezului fagure, dar acesta utilizează un miez tip fagure si are si dezavantajul ca spuma pătrunde si intre straturile fetelor de lucru.Other processes propose variants of making the work faces before the manufacture of the panel, such as patent EP 0628406A, which has a composite sandwich panel, made with the autoclaving technique, in which the bonding surface is enlarged by using an expandable layer introduced in honeycomb core cells, but it uses a honeycomb core and also has the disadvantage that foam penetrates between the layers of the working faces.

Mai sunt cunoscute panouri utilizate in industria mobilei cum ar fi cele din brevetele RO 107885 si respectiv 107886, care se refera la cate un panou estetic, de mobila si la un procedeu de realizare a acestuia, fiind realizat dintr-o placa aglomerata de așchii de lemn, pe suprafața careia se imprima, sau respectiv se aplica, un model decorativ, mulat, pe fata panoului si un strat de furnir pe dosul panoului.Panels used in the furniture industry are also known, such as those in patents RO 107885 and 107886, respectively, which refer to an aesthetic panel, to furniture and to a process for its realization, being made of a chipboard. wood, on the surface of which is printed, or applied, respectively, a decorative pattern, molded, on the front of the panel and a layer of veneer on the back of the panel.

Dezavantajele in cazul acestor panouri constau in aceea ca sunt folosibile doar ca elemente estetice , pot fi utilizate numai pentru elemente de mobilier ca elemente decorative si pentru realizarea acestora sunt necesare multe etape tehnologice, precum si utililaje complicate si costisitoare, ceea ce mărește timpul de fabricație si ridica costurile.The disadvantages in the case of these panels are that they are usable only as aesthetic elements, they can be used only for furniture as decorative elements and for their realization many technological steps are required, as well as complicated and expensive equipment, which increases manufacturing time. and raise costs.

Problema tehnica pe care o rezolva prezenta invenție este realizarea de panouri tip sandwich cu grosimi mai mari dar mai ușoare si cu tehnologie simplificata deci si costuri mai scăzute , destinate utilizării in industria mobilei la fabricarea reperelor de mobilier, nu numai cu destinație estetica.The technical problem solved by the present invention is the realization of sandwich panels with larger but lighter thicknesses and with simplified technology and therefore lower costs, intended for use in the furniture industry in the manufacture of furniture parts, not only for aesthetic purposes.

Ca noutate de fabricație acest tip compozit de panou folosește polistiren. In acest fel se pot obține grosimi mult mai mari de panou cu greutate redusa.As a novelty of manufacture, this type of composite panel uses polystyrene. In this way much greater thicknesses of lightweight panel can be obtained.

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Spre deosebire de panourile obținute cu structuri tip fagure , folosirea polistirenului expandat permite cantuirea directa pe linii de cantuire industrial precum si utilizarea accesoriilor clasice si nu a celor cu spuma ca in cazul panourilor cu structura fagure .Unlike the panels obtained with honeycomb structures, the use of expanded polystyrene allows direct edging on industrial edging lines as well as the use of classic accessories and not those with foam as in the case of honeycomb panels.

Panoul tip sandwich destinat utilizării in industria mobilei, conform invenției, înlătură dezavantajele menționate prin aceea ca structura de tip sandwich este obtinuta din combinații de unul sau mai multe straturi de P.A.L. (unul sau mai multe panouri stratificate de PAL) , polistiren expandat si P.F.L. . Panoul astfel obtinut poate fi înnobilat prin caserare si cantuire cu diverse folii decor . înnobilarea se poate efectua pe linii industriale de caserat si cantuire cu adezivi obisnuiti specific tehnologiei.The sandwich panel intended for use in the furniture industry according to the invention eliminates the mentioned disadvantages in that the sandwich structure is obtained from combinations of one or more layers of P.A.L. (one or more laminated chipboard panels), expanded polystyrene and P.F.L. . The panel thus obtained can be ennobled by casing and edging with various decoration foils. the ennobling can be carried out on industrial casing and edging lines with ordinary adhesives specific to the technology.

Procedeul de realizare a panoului tip sandwich , conform invenției, se refera la modalitatea de stratificare si lipire a elementelor componente, in lipirea straturilor cu adeziv polivinilic in dispersie la rece obtinandu-se o incleiere elastica rezistenta la variațiile dimensionale.The process of making the sandwich panel, according to the invention, refers to the method of layering and gluing the component elements, in gluing the layers with polyvinyl adhesive in cold dispersion obtaining an elastic gluing resistant to dimensional variations.

Incleierea pieselor cu adeziv se face in doua etape, si anume:The gluing of the parts with adhesive is done in two stages, namely:

• In prima etapa se aplica stratul de adeziv pe suprafața de incleiere, cu o grosime uniforma, după care se respecta perioada de timp a fazei deschise a adezivului, de 10-15 minute, timp in care piesele de încleiat nu sunt puse in contact.• In the first stage, the adhesive layer is applied on the gluing surface, with a uniform thickness, after which the time period of the open phase of the adhesive is observed, of 10-15 minutes, during which time the gluing parts are not put in contact.

• In a doua etapa sunt puse in contact suprafețele cu adeziv (prin suprapunere) si sunt supuse unei presiuni (apasari), timp in care se realizează întărirea adezivului pe cale chimica.• In the second stage, the surfaces are contacted with adhesive (by overlapping) and are subjected to pressure (pressure), during which time the adhesive is chemically hardened.

După întărirea adezivului, piesele piesele incleieate se stivuiesc si raman in repaus, timp de 12 pana la 24 ore, pentru definitivarea întăririi adezivului (perioada de aclimatizare).After the adhesive has hardened, the glued parts are stacked and remain at rest, for 12 to 24 hours, to complete the adhesive hardening (acclimatization period).

Spre deosebire de panourile obținute cu structuri tip fagure , folosirea polistirenului expandat permite cantuirea directa pe linii de cantuire industriale. Prin aplicarea invenției se obțin următoarele avantaje:Unlike panels obtained with honeycomb structures, the use of expanded polystyrene allows direct edging on industrial edging lines. By applying the invention the following advantages are obtained:

• Posibilitatea de realizare a anumitor repere de mobilier.• The possibility of making certain furniture parts.

• Obținerea de panouri cu grosime mare si cu greutate mica.• Obtaining panels with high thickness and low weight.

• Nu necesita tehnologie speciala de execuție.• Does not require special execution technology.

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• Permite cantuirea directa pe linii de cantuire industriale.• Allows direct weighing on industrial weighing lines.

• Permite caserare si cantuire cu diverse folii decor.• Allows scraping and edging with various decoration foils.

• înnobilarea se poate efectua pe linii industriale de caserat si cantuit cu adezivi obisnuiti specific tehnologiei.• the ennobling can be performed on industrial casing and edging lines with ordinary adhesives specific to the technology.

• Permite obținerea de mobilier cu greutate redusa.• Allows you to obtain light weight furniture.

Se dau in continuare doua exemple de realizare a unui panou conform invenției, in legătură cu figurile nr.1 si nr.2, care reprezintă:The following are two examples of making a panel according to the invention, in connection with figures no. 1 and no. 2, which represent:

Fig.1: Vedere spațiala a unui panou cu structura de tip sandwich PFLPOLISTIREN-PAL, avand vizibila secțiunea transversala a straturilor ;Fig.1: Spatial view of a panel with sandwich structure PFLPOLISTYRENE-PAL, having visible the cross section of the layers;

Fig. 2: Vedere spațiala a unui panou cu structura de tip sandwich PALPOLISTIREN-PAL, avand vizibila secțiunea transversala a straturilor;Fig. 2: Spatial view of a panel with PALPOLISTYREN-PAL sandwich structure, having visible the cross section of the layers;

Intr-un prim exemplu de realizare, panoul cu structura de tip sandwich, PFL-POLISTIREN - PAL, conform invenției, este realizat dintr-o placa de P.A.L.In a first embodiment, the panel with sandwich structure, PFL-POLYSTYRENE - PAL, according to the invention, is made of a P.A.L.

(3) pe care se lipește cu adeziv placa de polistiren expandat (2), pe care se lipește placa de P.F.L. (1). Placa de P.A.L. poate fi constituita din unul sau mai multe panouri stratificate(3) on which the expanded polystyrene board is glued (2), on which the P.F.L. (1). P.A.L. it may consist of one or more laminated panels

Procedeul de realizare a panoului tip sandwich PFL-POLISTIREN-PAL, conform invenției, consta in următoarele faze:The process of making the PFL-POLYSTYRENE-PAL sandwich panel, according to the invention, consists in the following phases:

• debitarea cu supradimensiune tehnologica a panourilor PFL-POLISTIRENPAL in vederea prelucrărilor ulterioare;• cutting with technological oversize the PFL-POLISTIRENPAL panels for further processing;

• incleierea cu adeziv se face la rece, prin aplicarea unui strat de adeziv , cu o grosime uniforma, pe panourile P.A.L. in mașina de aplicat adeziv cu valturi;• gluing with adhesive is done cold, by applying a layer of adhesive, with a uniform thickness, on the P.A.L. in the roller adhesive applicator;

• aplicarea unui strat de adeziv cu o grosime uniforma pe panourile PFL in mașina de aplicat adeziv cu valturi;• applying a layer of adhesive with a uniform thickness on the PFL panels in the roller adhesive applicator;

• respectarea perioadei de timp a fazei deschise a adezivului de 10-15 minute, in care plăcile nu sunt puse in contact realizandu-se evaporarea apei din adeziv si absorbția acestuia in lemn;• observance of the time period of the open phase of the adhesive of 10-15 minutes, in which the boards are not put in contact, the water evaporating from the adhesive and its absorption in the wood;

• punerea in contact, la poziție, a suprafețelor de P.A.L., POLISTIREN, P.F.L. prin suprapunere ;• contacting, in position, the surfaces of P.A.L., POLYSTYRENE, P.F.L. by overlapping;

• supunerea acestora la o presiune (apasare), timp in care se realizează întărirea adezivului pe cale chimica;• subjecting them to a pressure (pressure), during which time the adhesive is chemically hardened;

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0 -11- 2011 • stivuirea suprafețelor încleiate , după întărirea adezivului;0 -11- 2011 • stacking the glued surfaces, after hardening the adhesive;

• pastrarea acestora in repaus timp de 12 pana la 24 ore, pentru definitivarea întăririi adezivului (perioada de aclimatizare).• keeping them at rest for 12 to 24 hours, to complete the hardening of the adhesive (acclimatization period).

• finisarea panoului tip sandwich rezultat.• finishing the resulting sandwich panel.

• înnobilarea panoului tip sandwich rezultat prin caserare si cantuire cu diferite folii decor.• ennobling the sandwich panel resulting from casing and edging with different decoration foils.

In al doilea exemplu de realizare, panoul cu structura de tip sandwich, conform invenției, este realizat din placa de P.A.L. (3) pe care se lipește cu adeziv la rece placa de polistiren expandat (2), pe aceasta din urma lipindu-se placa de P.A.L. (1).In the second embodiment, the panel with the sandwich structure according to the invention is made of P.A.L. (3) on which the expanded polystyrene board is glued with cold adhesive (2), on which the P.A.L. (1).

Placa (ile) de P.A.L. poate( pot) fi constituita ( e) din unul sau mai multe panouri stratificateThe plate (s) of P.A.L. may consist of one or more layered panels

Procedeul de realizare a panoului tip sandwich PAL-POLISTIREN-PAL consta in următoarele faze:The process of making the PAL-POLYSTYRENE-PAL sandwich panel consists of the following phases:

• debitarea cu supradimensiune tehnologica a panourilor PAL-POLISTIRENPAL in vederea prelucrărilor ulterioare;• cutting with technological oversize the PAL-POLYSTYRENEAL panels for further processing;

• punerea in contact, la poziție, a suprafețelor de P.A.L., POLISTIREN, P.A.L. prin suprapunere ;• contacting, in position, the surfaces of P.A.L., POLYSTYRENE, P.A.L. by overlapping;

• stivuirea suprafețelor încleiate , după întărirea adezivului;• stacking the glued surfaces, after hardening the adhesive;

Claims

CLAIMS:

1. Sandwich panel for use in the furniture industry according to the invention, characterized in that it consists of a layered chipboard panel (3) (Fig.1) (from combinations of one or more layers of chipboard), polystyrene expanded (2, Fig.1) and PFL (1, Fig.1)

2. The process for obtaining a sandwich panel, according to the invention, refers to the method of layering and gluing the component elements, in gluing the layers with polyvinyl adhesive in cold dispersion obtaining an elastic gluing resistant to dimensional variations, in two stages , namely:

• In the first stage, the adhesive layer is cold applied on the gluing surfaces, PAL (3, Fig.1), respectively PFL (1, Fig.1), with a uniform thickness, after which the time period of open phase of the adhesive, 10-15 minutes, during which time the gluing parts are not in contact.

• In the second stage, the surfaces are contacted with adhesive (by overlapping) and are subjected to pressure, during which time the adhesive is chemically hardened. After the adhesive has hardened, the glued parts are stacked and remain at rest, for 12 to 24 hours, to complete the adhesive hardening (acclimatization period), after which they are finished.

3. Sandwich panel intended for use in the furniture industry, according to the invention, characterized in that it consists of a layered chipboard panel (3) (Fig.2) (from combinations of one or more layers of chipboard), polystyrene expanded (2, Fig.2) and PAL (1, Fig.2)

4. The process for obtaining a sandwich panel, according to the invention, refers to the method of layering and gluing the component elements, in gluing the layers with polyvinyl adhesive in cold dispersion obtaining an elastic gluing resistant to dimensional variations, in two stages , namely:

• In the first stage, apply the adhesive layer on the gluing surface, chipboard (3,

Fig.2), chipboard (1, Fig.2) with a uniform thickness, after which the time period of the open phase of the adhesive is observed, of 10-15 minutes, during which time the gluing parts are not put in contact.

• In the second stage, the surfaces are contacted with adhesive (by overlapping) and are subjected to pressure (pressure), during which time the adhesive is chemically hardened. After the adhesive has hardened, the glued parts are stacked and remain at rest, for 12 to 24 hours, to complete the adhesive hardening (acclimatization period).

5. The sandwich panel according to the invention characterized in that the gluing is done on the entire surface of the PAL (3) and PFL (1) panels, respectively.

6. The sandwich panel according to the invention, characterized in that it can be ennobled by casing and edging with various decoration foils, on industrial casing and edging lines and with ordinary adhesives specific to the technology.