A method for the production of wood panels

Abstract: A method for producing a simulated framed solid wood panel comprises providing a one-piece panel element (10), and covering at least one major surface of the panel element with a plurality of veneer elements (18 to 22). Each veneer element has a visible grain pattern and at least some of the veneer elements (21, 22) are orientated with their grain patterns at an angle to the grain patterns of immediately adjacent veneer elements (18 to 20). The veneer elements orientated as above are intimately bonded to the said surface to form the panel member, whereby the visible lines between adjacent bonded veneer elements simulate the appearance of joints between solid wood components.

Description: The invention relates to a method for producing a simulated framed solid wood panel member which method comprises the steps of (i) providing a one piece panel element comprising a low-grade wood, chipboard or medium density fibreboard; (ii) providing a plurality of veneer elements; (iii) applying an adhesive between the veneer elements and the panel element; (iv) pressing the veneer elements into intimate contact with the panel element using a compression moulding or embossing apparatus, each veneer element having a visible grain pattern and at least some of the veneer elements being oriented with their grain patterns at an angle to the grain patterns of immediately adjacent veneer elements; and (v) removing the compression moulding or embossing apparatus from the thus formed panel member whereby visible lines between adjacent bonded veneer elements simulate the appearance of joints between solid wood components for, the method for the production of simulated framed solid wood panels. Such a method is disclosed in, for example, German Patent Specification No. DE-A-3423252. Heretofore, the method for the production of wood panels such as frame raised or flat panel cabinet doors, wall and ceiling panelling, doors etc. employed the principle of using a solid wood frame consisting of solid wood components disposed transversely relative to each other and having a solid wood infill centre panel. It is also known to use low grade timber, chipboard or medium density fibre board wrapped with foil or wood veneer as frame elements with an infill centre panel also wrapped with foil or wood veneer. Significant disadvantages in the production of such wood panels include the relatively high cost and the time required to produce them. A further significant disadvantage of the known wood panels referred to above relates to the method of assembly of the components thereof. The joints and grooves necessary for the fabrication of, for example, the frame elements into a completed panel constitutes possible unhygenic conditions particularly when the panel is used in, for example, a kitchen or living room. It has been found for example that in an environment of relatively high humidity of air i.e. a kitchen the joints and grooves of the fabricated panel exhibit a tendency to pick up and retain dirt and/or moisture therein. It will be appreciated that a kitchen environment has a regular humidity cycle due to work carried out in the kitchen ― when one is cooking a high humidity enviromnent is common and when one is not cooking a much lower humidity environment is experienced. Consequent upon such a humidity cycle the wood of a fabricated frame tends to expand and contract causing in turn the wood elements of the panel to move relative to each other which causes the joints to open and close. While the relative movements of the wood elements are very small the joints do open sufficiently to accept and house dirt. Also once dirt gets into and is retained in the said joints it is very difficult to clean the dirt out of the joints. Further the dirt in the said joints will also tend to hold the joints in an open position making it easier for the joints to receive in more dirt. It is an object of the present invention to overcome these problems by routing or selectively recessing a surface of the panel element thereby removing the hard outer layer and exposing the relatively soft substrate of recess so that the edges of at least some of the veneer elements overlap in said recess. Preferably, the method further comprises the steps of allowing the said edges to move relative to each other when pressing the veneer elements into intimate contact with the panel element. Preferably, the recess is a decorative shape. Preferably, the recess includes at least one continuous depression. Preferably, the panel element is substantially rectangular, and the said depression is also substantially rectangular with its edges in parallel spaced apart relationship relative to the respective edges of the panel element. Preferably, the depression has chamfered sides. The invention will be understood in greater detail from the following description of a preferred embodiment thereof given by way of example only and with reference to the accompanying drawings in which: Figure 1 is a perspective view of a panel element for use in the method according to the invention, Figure 2 is a perspective view of a panel produced by the method according to the invention; Figure 3 is a plan view of the panel of Figure 2 of the drawings; Figure 4 is a cross-sectional view of the panel of Figure 3 of the drawings taken along the line IV-IV and viewed in the direction of the associated arrows; Figure 5 is a cross-sectional view of the panel of Figure 3, of the drawings taken along the line V-V and viewed in the direction of the associated arrows; Figure 6 is an exploded perspective view of the veneer elements for use in the method according to the invention; and Figure 7 is a view of the veneer elements of Figure 6 of the drawings in an overlapping condition, prior to the bonding operation. Referring now to the drawings, there is shown a panel element 10 made from a low grade wood, chipboard or medium density fibre board or the like; which is of one-piece solid construction; and which is substantially rectangular in shape having edges 11, 12, 13 and 14 and opposite major surfaces of which only one such surface is shown in Figure 1. A closed continuous substantially rectangular circumferential depression 15 is initially produced by routing or otherwise selectively recessing the major surface of the original flat panel element (not shown), the edges of the depression 15 being in parallel spaced-apart relationship to respective edges of the element 10. The outer peripheral sides 16 of the recess 15 are formed with an ogee moulding. The inner peripheral sides 17 of the recess 15 are formed with a chamfered slope inclined upward from the inner end of the ogee moulding on the sides 16 to a central plateau area 10 a formed by the routing out of the continuous depression or recess 15 in the panel element 10. Routing the flat panel element removes the relatively hard outer layer of the element and exposes and relatively soft substrate thereof. It will be understood that the depression 15 is but one example of any desired decorative shape which can be formed by selectively recessing the major surface of the panel element 10. A plurality of veneer elements 18, 19, 20, 21 and 22 with visible grain patterns are shown in Figure 6 of the drawings. In order to produce a simulated framed solid wood furniture panel, the veneer elements 18,19 and 20 have their veneer grain pattern in a direction transverse to the direction of the veneer grain pattern of the veneer elements 21 and 22. As will be observed from Figure 7 of the drawings, the veneer elements 18, 19, 21 and 22 are positioned so that their edges overlap those of the element 20, which overlap is indicated by the dotted lines 23, 24, 25 and 26 of Figure 7. Essentially, therefore, the veneer element 20 is positioned so that its peripheral edges are over the relevant complementary edges of the veneer elements 18, 19, 21 and 22. The degree of overlap should be such that following bonding of the veneer elements 18, 19, 20, 21 and 22 to the panel element 10, there is still a small but significant overlap. It will be noted that there is no overlap but edge to edge abutment between the veneer elements 18 and 21, 22 and 19 and 21, 22. To manufacture a completed panel 40, suitable adhesive is applied to one side of each veneer element 18, 19, 20, 21 and 22 and the elements 18, 19, 20, 21 and 22 are then placed, adhesive side down, on the panel element 10 in the overlapping manner described above. Using any conventional bonding technique, the veneer elements 18, 19, 20, 21 and 22 are intimately bonded to the panel element 10 to form the panel 40. Where the right hand edge of the veneer element 18 abuts the veneer elements 21, 22 and where the left hand edge of the veneer element 19 abuts the veneer elements 21, 22, lines 27, 28, 29 and 30 are generated. The lines 27, 28, 29 and 30 enhance the effect that the panel 40 is made from jointed conventional solid wood frame components with a solid wood infill panel. This effect is further enhanced by the transverse orientation of the grain of the veneer elements 18, 19, 20, 21 and 22 described above. It will be appreciated that the enlargements of part of Figures 4 and 5 of the drawings are exaggerated. In practice, the bonding process will compress the veneer elements 18, 19, 20, 21 and 22 to the extent as to be virtually without thickness when compared with the thickness of the panel element 10. The relatively soft substrate is capable of absorbing any uneveness caused by overlapping of the veneer elements. The step of producing the ogee moundings 16 and 17 may, as an alternative to routing, be made using the compression moulding or embossing techniques associated with the apparatus disclosed and described in European Patent Specification No. 0110708 (Gartland). In addition, the step of bonding the veneer elements 18, 19, 20, 21 and 22 to the panel element 10 may conveniently be carried out by the same apparatus. When one uses for the bonding operation the apparatus described in EP 0110708, (Gartland) the veneer elements 18, 19, 20, 21 and 22, by virtue of their overlapping, "float" or more relative to each other as the pressure of the tool of the apparatus (not shown) is applied during bonding. In this connection specific reference is made to Figure 5 where the arrows A and B respectively indicate the relative sliding movement of the overlapped veneer elements 18 and 20 as the pressure is applied during the bonding operation. This allows one to use an increased depth in the recess 15 or design area over known conventional veneer panel constructions, as the veneer elements 18, 19, 20, 21 and 22 are not restricted by the stretch properties thereof. In addition, the recess 15 or design area can have a sharper profile. This means in pratice that the use of relatively difficult-to-work with veneer elements 18, 19, 20, 21 and 22 is now a practical proposition. As a alternative to applying adhesive to the, in use, rear surfaces of the veneer elements 18, 19, 20, 21 and 22 prior to bonding the veneer elements to the panel element 10, it is envisaged that one may apply to the relevant surfaces of the panel element 10 an adhesive film and a strip of adhesive film to the, in use, rear surface of the portions of the veneer element 20 which overlap the other veneer elements 18, 19, 20, 21 and 22. The panel 40 may be used in the construction of doors adapted for use on, for example, kitchen units. The overlapping of the veneer elements 18, 19, 20, 21 and 22 provide for a complete covering of the panel element 10 and thus, due to the absence of grooves and joints associated with framed assembly panels, the problems associated with dirt and moisture penetrating such grooves and joints is eliminated.

Claims: 1. A method for producing a simulated framed solid wood panel member (40) which method comprises the steps of (i) providing a one piece panel element comprising a low-grade wood, chipboard or medium density fibreboard; (ii) providing a plurality of veneer elements (18-20); (iii) applying an adhesive between the veneer elements (18-22) and the panel element (10); (iv) pressing the veneer elements (18-22) into intimate contact with the panel element (10) using a compression moulding or embossing apparatus, each veneer element (18-22) having a visible grain pattern and at least some of the veneer elements being oriented with their grain patterns at an angle to the grain patterns of immediately adjacent veneer elements (21-22); and (v) removing the compression moulding or embossing apparatus from the thus formed panel member whereby visible lines between adjacent bonded veneer elements simulate the appearance of joints between solid wood components characterised in that the method further comprises the steps of routing or selectively recessing a surface of the panel element (12) thereby removing the relatively hard outer layer and exposing the relatively soft substrate of the recess (15) so that the edges of at least some of the veneer elements (18, 20; 19, 20) overlap in said recess (15). 2. A method as claimed in Claim 1 characterised in that the method further comprises the step of allowing the said edges to move relative to each other when pressing the veneer elements (18-22) into intimate contact with the panel element (10). 3. A method as claimed in Claim 1 or Claim 2 wherein the recess (15) is a decorative shape (15). 4. A method as claimed in any of Claims 1-3 characterised in that the recess (15) includes at least one continuous depression (15). 5. A method as claimed in Claim 4 characterised in that the panel element (10) is substantially rectangular, and the said depression is also substantially rectangular with its edges in parallel spaced apart relationship relative to the respective edges of the panel element (10). 6. A method as claimed in Claim 4 or Claim 5 characterised in that the depression has chamfered sides (17).

Inventors: GARTLAND, MATTHEW
Applicants: GARTLAND, MATTHEW
Application year: 1988
Main classification: B27M3
IPC codes: A47B96, B27M3