WO2000000343A1 - Method and plant for continuously cladding panels using vacuum - Google Patents
Method and plant for continuously cladding panels using vacuum Download PDFInfo
- Publication number
- WO2000000343A1 WO2000000343A1 PCT/EP1999/004458 EP9904458W WO0000343A1 WO 2000000343 A1 WO2000000343 A1 WO 2000000343A1 EP 9904458 W EP9904458 W EP 9904458W WO 0000343 A1 WO0000343 A1 WO 0000343A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- panels
- sheet
- endless conveyor
- thermoplastic material
- plant
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
- B29C63/02—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor using sheet or web-like material
- B29C63/16—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor using sheet or web-like material applied by "rubber" bag or diaphragm
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
- B29C51/16—Lining or labelling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
- B29C63/02—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor using sheet or web-like material
- B29C63/04—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor using sheet or web-like material by folding, winding, bending or the like
- B29C63/044—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor using sheet or web-like material by folding, winding, bending or the like continuously
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
- B29C66/112—Single lapped joints
- B29C66/1122—Single lap to lap joints, i.e. overlap joints
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
- B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
- B29C66/43—Joining a relatively small portion of the surface of said articles
- B29C66/433—Casing-in, i.e. enclosing an element between two sheets by an outlined seam
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2791/00—Shaping characteristics in general
- B29C2791/004—Shaping under special conditions
- B29C2791/006—Using vacuum
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2027/00—Use of polyvinylhalogenides or derivatives thereof as moulding material
- B29K2027/06—PVC, i.e. polyvinylchloride
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2101/00—Use of unspecified macromolecular compounds as moulding material
- B29K2101/10—Thermosetting resins
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/0097—Glues or adhesives, e.g. hot melts or thermofusible adhesives
Definitions
- This invention relates to a method for continuously cladding panels, in particular of wood-based material, with a sheet of thermoplastic material, and a plant for implementing the method.
- Methods are known for cladding a surface and possibly the edges of a panel of wood-based material, for example MDF (medium density fibreboard) with a sheet of thermoplastic material, for example PVC.
- MDF medium density fibreboard
- this method uses a press provided with a rigid plate and an elastically yieldable plate.
- a series of panels, already clad on one side with a sheet of PVC, melamine, paper or another material, are positioned in the press such that their clad side faces its rigid plate and is kept spaced therefrom, for example by a suitable spacer in the form of another panel of smaller dimensions than that being processed.
- the opposite side of the panel ie the side facing the yieldable plate of the press, is treated with a layer of heat-activated adhesive and the plastic sheet is placed on it.
- thermoplastic sheet On operating the press, the combined effect of temperature, pressure, any suction applied between the panel and plastic sheet, the yieldability of the elastically yieldable plate and the distance between the panel being processed and the rigid plate of the press, softens the thermoplastic material and by virtue of the heat-activation of the adhesive the thermoplastic sheet adheres completely and permanently to the possibly grooved surface of the panel and to its edges.
- Presses without an elastically yieldable plate are also known.
- the thermoplastic sheet is softened and subjected to pressure to make it adhere permanently to the panel to be clad.
- the press dimensions are generally much greater than the panel dimensions, it is usual to position several panels on the press so that the press can operate simultaneously of them and accelerate the cladding operation.
- a drawback of these known methods is that the cladding method is always discontinuous, and between one press operation and the subsequent positioning of the spacers on its lower plate requires the panels for ciadding to be accurately positioned on them, followed by a waiting time while the press completes its action, then the removal of the processed panels and possibly the spacers from the press, these being operations which are laborious to carry out and involve lengthy waiting times.
- This invention confronts and solves the problem of subjecting panels, particularly of wood-based material, which have already been clad on one side with a sheet of thermoplastic material, to continuous cladding with a separate sheet of thermoplastic material on their other side and their edges.
- Such panels are continuously clad according to the invention through a method as claimed in claim 1.
- Figure 1 is a longitudinal schematic view of a plant for implementing the method of the invention
- Figure 2 is a plan view thereof on the line ll-ll of Figure 1 ,
- Figure 3 is an enlarged partial longitudinal section therethrough on the line
- Figure 4 is an enlarged cross-section therethrough on the line IV-IV of Figure 2
- Figure 5 is an enlarged cross-section therethrough on the line V-V of Figure
- Figure 6 is an enlarged cross-section therethrough on the line VI-VI of Figure 2
- Figure 7 shows a variant in the same view as Figure 6.
- the method of the invention is implemented by a plant which basically comprises an endless conveyor belt 2 extending from one end to the other of a bed 4 supported by legs 6 resting on the floor 8.
- a feed station for a continuous sheet 10 of thermoplastic material On the bed 4 there is provided, in correspondence with the loading station (on the left observing Figures 1 and 2), a feed station for a continuous sheet 10 of thermoplastic material.
- This feed station is indicated overall by 12 and comprises a pair of uprights 14 applied to the bed 4 and supporting rollers 16 for different sheets 10.
- a first oven 17 Downstream of the feed station 12, with reference to the direction of advancement of the conveyor belt 2, indicated by the arrow 13 in Figure 1 , there is provided a first oven 17, the purpose of which, as described hereinafter, is to heat the panels 18 continuously loaded onto the conveyor belt 2, and the continuous sheet 10.
- These panels which are preferably of wood-based material, but could also be of other material, for example plastic or metal, are sprayed with a heat-activated adhesive, for example a polyurethan
- a second oven 19 Downstream of this first oven 17 there is provided a second oven 19, positioned within a sealed chamber maintained under vacuum by a suction system indicated overall by 20 and comprising a traditional vacuum pump.
- a suction system indicated overall by 20 and comprising a traditional vacuum pump.
- a tank 22 To ensure the necessary vacuum within said chamber there is provided in a position below the conveyor belt 2 a tank 22 with its upper surface perforated and facing the conveyor belt, which also comprises a plurality of apertures over its entire surface.
- a pair of pressers consisting essentially of endless straps 24, maintained with a rectilinear portion adhering to the conveyor belt 2 by traditional systems, not shown on the drawings for simplicity of representation.
- a ventilating chamber 28 Downstream of the second oven 19 there is provided a ventilating chamber 28. This is also connected to a suction system similar to that connected to the oven 19, ie comprising a vacuum pump connected to a tank 28 having its upper surface perforated and facing the conveyor belt 2. However in contrast to the oven 19, the ventilating chamber 26 is also provided with a fan 29 able to feed a jet of cold air onto the upper surface of the underlying sheet of thermoplastic material 10.
- the conveyor belt 2 comprises a plurality of transverse projections 30 at intervals depending on the dimensions of the panels 18 to be processed.
- the aforedescribed plant operates as follows: spacers 32 of dimensions slightly less than the dimensions of the panels 18 to be clad are placed on the conveyor belt 2 at its loading end, ie the left end with reference to Figure 1 , on each spacer there then being rested a panel 18 already clad on its lower surface with a sheet of thermoplastic material (for example PVC, melamine etc.) and previously sprayed on its upper surface, which may comprise ornamental grooves, and on its edges with a layer of heat-activated adhesive.
- a sheet of thermoplastic material for example PVC, melamine etc.
- the sheet 10 of thermoplastic material which enters the first oven 17 together with them.
- the sheet 10 undergoes heat-softening therein and at the same time the adhesive previously sprayed onto the panels 18 becomes active.
- the speed of advancement of the conveyor belt 2 and the internal temperature of the oven 17 are correlated with the length of the oven sot that on leaving the oven it is ensured that the PVC sheed 10 will have softened and the adhesive become active.
- the panels 18 enter the second oven 19 the combined effect of the heat and the vacuum causes the softened sheet 10 to adhere to the upper surface and edges of the panels 18, and also causes the sheet 10 retained between the conveyor belt 2 and the pressers 24 to wrap about the lower corners of the panels, so that they become completely clad.
- paneis 18 are obtained completely clad with the continuous PVC sheet 10 and ready to be fed to the subsequent separation and finishing operations.
- the spacers can be removed one by one to be then repositioned on the conveyor belt 2 at the entry end of the plant.
- the method of the invention and the plant for implementing it are particularly advantageous in that they enable panels to be continuously clad on a surface and on the edges with a sheet of PVC or other thermoplastic material.
- a series of variants can be provided or suggested.
- the spacers 32 instead of having the spacers 32 positioned on a conveyor belt 2, they can be formed directly on the belt, possibly using criteria which ensure their usability for panels of different dimensions, to hence dispense with the operations involved in applying each spacer to the loading end of the bed 4 and removing it from the discharge end.
- the conveyor belt 2 could be formed in different sections, of which only that through the interior of said oven 19 and of said cooling chamber 26 is perforated.
- the sheet 10 is covered with an endless membrane 34 extending between end rollers 36 and advancing at the same speed as the conveyor belt 2 and hence as the sheet 10.
- Figure 7 shows the membrane 34 extending transversely for the entire width of the continuous sheet 10 and then retained in correspondence with the longitudinal edges of the pressers 24.
- the same membrane 34 is also shown in Figure 3 for economy of representation.
- the membrane 34 is provided with inflatable transverse pockets, which are positioned between one panel and the next and inflated in synchronism with the advancement of these latter, in order to cause the underlying softened sheet 10 to forcibly adhere to the conveyor belt 2 and/or to the transverse projections 30.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Laminated Bodies (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU47787/99A AU4778799A (en) | 1998-06-30 | 1999-06-28 | Method and plant for continuously cladding panels using vacuum |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT1998VE000029A IT1306473B1 (en) | 1998-06-30 | 1998-06-30 | METHOD FOR COATING PANELS CONTINUOUSLY, IN PARTICULAR OF WOODY MATERIAL, WITH A SHEET OF THERMOPLASTIC MATERIAL AND EQUIPMENT |
ITVE98A000029 | 1998-06-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2000000343A1 true WO2000000343A1 (en) | 2000-01-06 |
Family
ID=11424381
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1999/004458 WO2000000343A1 (en) | 1998-06-30 | 1999-06-28 | Method and plant for continuously cladding panels using vacuum |
Country Status (3)
Country | Link |
---|---|
AU (1) | AU4778799A (en) |
IT (1) | IT1306473B1 (en) |
WO (1) | WO2000000343A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES2338394A1 (en) * | 2007-05-07 | 2010-05-06 | Jesus Francisco Barberan La Torre | Apparatus for applying a cover sheet on panels |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3202561A (en) * | 1961-03-30 | 1965-08-24 | Johns Manville | Method for making acoustical tile with thermoplastic film covering |
US4092197A (en) * | 1973-02-02 | 1978-05-30 | Robbins Edward S | Method of securing a thermoplastic covering to a grooved block |
DE2812691A1 (en) * | 1978-03-23 | 1979-09-27 | Friz Gmbh & Co Helmut | Continuous veneering and laminating plant for workpieces - adapts different types of equipment to widely ranging operating conditions |
JPS5828350A (en) * | 1981-08-10 | 1983-02-19 | Shinguu:Kk | Vacuum laminating method |
US4666749A (en) * | 1986-01-17 | 1987-05-19 | Mccurry Thomas M | Covering for roll end-support panel |
EP0593429B1 (en) | 1989-08-07 | 1995-06-14 | 3B S.p.A. | Apparatus for covering a surface and the edges of a panel of wooden or like material with a sheet of thermodeformable material |
EP0593427B1 (en) | 1989-08-07 | 1995-10-11 | 3B S.p.A. | Apparatus for covering a surface and the edges of a panel of wooden or like material with a sheet of thermodeformable material |
-
1998
- 1998-06-30 IT IT1998VE000029A patent/IT1306473B1/en active
-
1999
- 1999-06-28 AU AU47787/99A patent/AU4778799A/en not_active Abandoned
- 1999-06-28 WO PCT/EP1999/004458 patent/WO2000000343A1/en active Application Filing
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3202561A (en) * | 1961-03-30 | 1965-08-24 | Johns Manville | Method for making acoustical tile with thermoplastic film covering |
US4092197A (en) * | 1973-02-02 | 1978-05-30 | Robbins Edward S | Method of securing a thermoplastic covering to a grooved block |
DE2812691A1 (en) * | 1978-03-23 | 1979-09-27 | Friz Gmbh & Co Helmut | Continuous veneering and laminating plant for workpieces - adapts different types of equipment to widely ranging operating conditions |
JPS5828350A (en) * | 1981-08-10 | 1983-02-19 | Shinguu:Kk | Vacuum laminating method |
US4666749A (en) * | 1986-01-17 | 1987-05-19 | Mccurry Thomas M | Covering for roll end-support panel |
EP0593429B1 (en) | 1989-08-07 | 1995-06-14 | 3B S.p.A. | Apparatus for covering a surface and the edges of a panel of wooden or like material with a sheet of thermodeformable material |
EP0593427B1 (en) | 1989-08-07 | 1995-10-11 | 3B S.p.A. | Apparatus for covering a surface and the edges of a panel of wooden or like material with a sheet of thermodeformable material |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 006, no. 106 (M - 213) 10 May 1983 (1983-05-10) * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES2338394A1 (en) * | 2007-05-07 | 2010-05-06 | Jesus Francisco Barberan La Torre | Apparatus for applying a cover sheet on panels |
Also Published As
Publication number | Publication date |
---|---|
IT1306473B1 (en) | 2001-06-11 |
AU4778799A (en) | 2000-01-17 |
ITVE980029A1 (en) | 1999-12-30 |
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