US3283052A - Method and apparatus for coating the edge portions of compressed workpieces - Google Patents

Method and apparatus for coating the edge portions of compressed workpieces Download PDF

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Publication number
US3283052A
US3283052A US29545763A US3283052A US 3283052 A US3283052 A US 3283052A US 29545763 A US29545763 A US 29545763A US 3283052 A US3283052 A US 3283052A
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Prior art keywords
edge portion
workpiece
lateral edge
sheet material
plastic
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Munk Edmund
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Furnier und Sperrholzwerk JF Werz Jr KG Werzalit Pressholzwerk
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Furnier und Sperrholzwerk JF Werz Jr KG Werzalit Pressholzwerk
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    • 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
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/816—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the mounting of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8161—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the mounting of the pressing elements, e.g. of the welding jaws or clamps said pressing elements being supported or backed-up by springs or by resilient material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27D—WORKING VENEER OR PLYWOOD
    • B27D5/00—Other working of veneer or plywood specially adapted to veneer or plywood
    • B27D5/003—Other working of veneer or plywood specially adapted to veneer or plywood securing a veneer strip to a panel edge
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
    • B27N5/00—Manufacture of non-flat articles
    • 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
    • B29C63/0026—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor an edge face with strip material, e.g. a panel edge
    • 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
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • 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
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B29C65/24—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools characterised by the means for heating the tool
    • B29C65/30—Electrical means
    • B29C65/305—Electrical means involving the use of cartridge heaters
    • 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
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • 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
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81411—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat
    • B29C66/81421—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being convex or concave
    • B29C66/81422—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being convex or concave being convex
    • 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
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81411—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat
    • B29C66/81425—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being stepped, e.g. comprising a shoulder
    • 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
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8145—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the constructional aspects of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/81461—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the constructional aspects of the pressing elements, e.g. of the welding jaws or clamps being multi-lamellar or segmented, i.e. comprising a plurality of strips, plates or stacked elements
    • 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
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/832—Reciprocating joining or pressing tools
    • B29C66/8322—Joining or pressing tools reciprocating along one axis
    • 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
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/84—Specific machine types or machines suitable for specific applications
    • B29C66/843—Machines for making separate joints at the same time in different planes; Machines for making separate joints at the same time mounted in parallel or in series
    • 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
    • B29C66/72—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 structure of the material of the parts to be joined
    • B29C66/723—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 structure of the material of the parts to be joined being multi-layered
    • B29C66/7232—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 structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer
    • B29C66/72327—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 structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer consisting of natural products or their composites, not provided for in B29C66/72321 - B29C66/72324
    • B29C66/72328—Paper
    • 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
    • B29C66/72—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 structure of the material of the parts to be joined
    • B29C66/723—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 structure of the material of the parts to be joined being multi-layered
    • B29C66/7232—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 structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer
    • B29C66/72327—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 structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer consisting of natural products or their composites, not provided for in B29C66/72321 - B29C66/72324
    • B29C66/72329—Wood
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10—Methods of surface bonding and/or assembly therefor
    • Y10T156/1052—Methods of surface bonding and/or assembly therefor with cutting, punching, tearing or severing
    • Y10T156/108—Flash, trim or excess removal

Definitions

  • the present invention relates to a method of bonding a sheet material to one or more lateral wall or surfaces of a compressed material or workpiece in which, due to the fact that this material iscompressed in only one direction upon its opposite outer surfaces, the compressive strength of the inner parts thereof is lower than that of the parts in the vicinity of these outer surfaces.
  • the invention further relates to suitable compression molds for carrying out the new method.
  • the present invention may also be applied for considerably improving a glued joint between a sheet material of any kind with the lateral surfaces of a compressed material or workpiece, it is the principal object of the invention to coat these surfaces with a sheet material which consists of or is impregnated with a thermosetting plastic and to carry out the coating process by first applying the sheet material in an only partly condensed condition upon the 3,283,952 Patented Nov.
  • the most important feature of the present invention a feature which may also be applied in a similar manner in gluing or cementing a sheet material to the lateral surfaces of a workpiece--therefore consists in applying the sheet material under pressure upon the surface by means of a pressure tool which is designed so as to act upon the inner or central parts of the edge portion more strongly than upon the outer parts and thus to compress these inner parts to a solidity and compressive strength substantially equal to those of the outer parts.
  • the same effect may, according to the invention, also be attained by machining the edge portion so that the inner less compressed parts thereof project outwardly and by then applying the sheet material on the surface thereof under such a pressure that these projecting parts are compressed to substantially the same compressive strength as the outer parts. Since the thermosetting sheet material is at the same time heated to the proper temperature, the synthetic resin thereof will melt and penetrate uniformly into the edge portion of the workpiece so that after being cured completely it will permanently lock the coating strip to the surface.
  • the lateral surfaces of the workpiece which are to be coated do not have to be plane, but they may also be of an uneven, for example, angular shape.
  • the plastic strip is then preferably premolded under heat to the required shape without, however, being finally condensed.
  • the pre-molded strip is then applied upon the uneven or angular surface and molded thereon under heat and pressure in the manner as previously described so that the inner edge portions will at the same time be compressed to a solidity substantially equal to that of the outer parts thereof.
  • one or more punches of a shape in accordance with the edge portion may then be pressed in an inclined direction upon the plastic strip.
  • Another important feature of the new molding method is the simple manner in which the excess parts of the plastic strip which are not secured to the lateral surface of the workpiece may be removed. Since during the molding process these excess parts are heated but not compressed, they are not condensed and therefore become extremely brittle. They may then be removed without difficulty, without leaving any rough edges on the plastic strip, and possibly even without showing any edges.
  • the lateral surfaces of a plasticcoated chipboard or the like is coated with plastic strips of the same color or design as that of the plastic sheets on the outer surfaces of the chipboard, the edges of the plastic strips will combine with those of the plastic sheets and will be practically invisible.
  • the finally coated board will then appear to consist entirely of plastic or to be embedded completely in a continuous layer of plastic.
  • the compression mold according to the present invention may be designed for coating the lateral surfaces of only one piece of compressed material or one workpiece or for coating simultaneously in a single operation the surfaces of a plurality of superimposed or laterally adjacent workpieces, for example, of a stack of boards of a compressed fibrous material such as chipboard or the like.
  • the mold is preferably provided with a plurality of punches or forces which are operated together by a single ram. Each of these punches individually is resiliently mounted by suitable means in or on this ram for separate engagement with one of the superimposed or adjacent workpieces so that minor deviations in size between the different work pieces will be compensated and all workpieces will be equally coated.
  • the resilient punches on each side may then be driven separately from those on the other side by different rams or the abutments on one side with the resilient punches between them and supported thereby may be mounted in a stationary position, while the abutments on the other side with the respective resilient punches between and supported by them are connected to or form a part of the single ram of the machine.
  • Either of these moulds as above described has the advantage that it permits a lateral surface of a workpiece to be coated only at one side thereof or both lateral surfaces simultaneously at opposite sides of the workpiece.
  • the operation of coating the lateral surfaces of a plurality of superimposed or adjacent workpieces simultaneously may be carried out very economically by em ploying a single sheet of plastic for coating the corresponding surfaces of the entire stack of workpieces. Since during the molding the parts of the sheet material between the adjacent workpieces are heated but not compressed, they become extremely brittle and may, when the coatings are completely cured, be very easily separated from each other without leaving any rough edges on the inidivdual workpieces.
  • the principal object of the invention to compress the inner or central parts of the edge portion of a workpiece to a solidity substantially equal to that of the outer portion may be attained either by first machining this edge portion so that the softer inner parts project outwardly beyond their respective points to which they are to be compressed by one or more heated punches of a shape in accordance with that of the final coated surface and by their compressing these central projecting portions through the plastic strip to substantially the same solidity as that of the outer parts, or it may be attained by making the heated punch or punches of a shape so that their central parts project so as to bulge out the plastic strip and compress the central parts of the edge portion through the plastic strip to the required solidity.
  • the compressing end of the punch or punches may either be solid or it may consist of a flexible material which may be heated, for example, a strip of chrome-nickel steel, and which is connected by means of an intermediate pressure cushion to the actual punch which is likewise adapted to be heated in order to contribute to the heating of the flexible material. Due to the lower solidity of the central parts of the edge portion, the flexible material will under the pressure of the punch be centrally bent and penetrate together with the plastic strip into the softer parts of the edge portion until they have substantially the same compressive strength as the outer portion. At the same time,
  • the flexible material will through the plastic strip smooth out and compensate any irregularities on the surface of the edge portion.
  • the flexible material is preferably heated electrically by resistance heating, while the punch itself may be heated in any suitable manner, for example, electrically or by steam.
  • FIGURE 1 is a perspective view shown in longitudinal cross section illustrating the least compressed area of the lateral edge portion formed with a convex surface and of a punch with a plain end surface for molding a strip of sheet material to this surface and for compressing it to a flat shape.
  • FIGURE 2 shows a longitudinal section of the board according to FIGURE 1, but at the time when through the strip of sheet plastic the convex edge portion of the board is compressed to'a flat shape and this strip is at the same time molded to the board.
  • FIGURES 3 and 4 show a modificaion of the invention with longitudinal sections of a punch and board in which the positions of the convex and flat edge portions of the punch and board as shown in FIGURES 1 and 2 are reversed. 7
  • FIGURE 5 shows a longitudinal section of a further moification of the invention, in which the punch is provided with a pressure cushion and a flexible pressure element thereon.
  • FIGURE 6 shows a longitudinal section .of a further modification of the invention in which three punches similar to the punch according to FIGURES 3 and 4, but resiliently mounted and acted upon by a common ram, are superimposed on each other for simultaneously coating three workpieces.
  • FIGURE '7 shows a longitudinal section of a further modification of the invention in which two directly adjacent, Vresiliently mounted punches are movable at an inclined angle to a boardtwith a lateral edge portion of an angular cross section for coating this edge portion with a premolded strip of plastic.
  • FIGURE 8 shows a longitudinal section of a compression mould for simultaneously coating the opposite edge portions of a larger number of workpieces.
  • the ditficulty in applying a coating of sheet material uniformly, securely and permanently to a lateral surface of a workpiece which is produced by compression from two opposite sides, for example, a workpiece of chipboard, fiber board, or a similar material is due to the fact that the compressive strength of the material gradually diminishes toward the center between the outer surfaces upon which the pressure was applied during the production of the workpiece, andthat therefore the compressive strength of the lateral edge portion to be coated also diminishes toward its center.
  • the liquefied synthetic resin thereof will not properly penetrate into the surface to be coated and will not when set lock the sheet material at this point securely to the workpiece. Furthermore, since the proper condensation of the synthetic resin requires the application of a certain amount of pressure and, due to the lack of a suflicient back pressure by the central parts of the edge portion to be coacted, this pressure cannot be exerted, the plastic at these points may under the high temperatures applied burn up and become so brittle that they may easily break under an impact.
  • the greatness of the present invention resides primarily in the simplicity in which it has solved these difliculties.
  • the present invention provides two methods the effects of which are identical. According to the first of these methods, as illustrated particularly in FIGURES l and 2, the workpiece for example, a plate 1 of chipboard, which is to be coated along at least one of its lateral edge portions, is produced by compression upon its main outer surfaces 2 which during this compression may likewise be coated with plastic.
  • plate 1 Due to this compression, plate 1 contains outer areas 3 of a higher compressive strength and more central inner areas 4 of a lower compressive strength. In order to provide the lateral edge portion 5 of plate 1 with a substantially uniform compressive strength, this edge portion is first made of a convex shape. The extent of its convexity depends upon the difference between the highest and lowest compressive strength of the areas 3 and 4.
  • This plate 1 is plated in a fixed position on a spacing bar 6 in a compression mold which is only indicated diagrammatically and comprises a punch or force 7 which is adapted to be heated, for example, by steam, and to be reciproacted in the direction of the arrow.
  • a strip 9 of a partly condensed thermoplastic sheet material is placed which is then pressed by the heated punch 7 against the edge portion 5 until the convexity of the latter is flattened out completely and the entire surface of the edge portion as indicated by the shaded area 10 in FIGURE 2, is compressed to a substantially uniform solidity.
  • the plastic strip as shown at 11 in FIGURE 2 is thereby molded uniformly and intimately to the outer surface of the edge portion, except the free outer edges 12 of the plastic strip which for the lack of pressure thereon become so extremely brittle that they may be broken olf flush with the outer surface 2. If these surfaces 2 also consist of a coating of plastic, the outer edges of the plastic coating 11 on the lateral surface of plate 1 will combine with the coating 2 so that practically no intermediate seam will be visible.
  • FIG- URES 3 and 4 differs from the embodiment according to FIGURES 1 and 2 merely by the fact that the convex edge portion for increasing the compressive strength of the more central parts 14 of plate 13 to substantially the same strength as the outer parts 15 is provided on the end 16 of punch 17, while the lateral edge portion 18 of plate 13 has a plane surface.
  • FIGURE 4 shows that the convex pressure surface 16 on punch 17 presses the strip of plastic 19 against the plane surface 18 of plate 13, as shown in FIGURE 3, and thereby compresses this 6 surface to a concave shape, as indicated at 2th, and to a substantially uniform compressive strength, as indicated by the shaded area 21.
  • FIGURE 5 illustrates a further modification of the invention.
  • the lateral edge portion of plate 22 has again a plane surface 23 as the plate 13 in FIGURE 3.
  • the punch 26 which is movable in the direction of the arrow is provided with a pressure cushion 27 and on this pressure cushion with a flexible strip 28, for example, of chrome-nickel steel, which is heated electrically by resistance-heating. Since the heat capacity of this flexible strip is relatively small, punch 26 is additionally heated, as indicated at 29, either electrically or by steam.
  • FIGURE 6 illustrates diagrammatically a pressure mold which is provided with three superimposed heated punches 31 similar to punch 17 as shown in FIGURES 3 and 4 and provided with convex end surfaces 32 for simultaneously compressing the lateral edge portion 33 of three plates 34 to -a substantially uniform compressive strength in a similar manner as described with reference to FIGURE 4.
  • the three punches 31 are moved simultaneously by a common ram 35 through individual springs 36 or similar cushion means which are provided in order to compensate for minor differences in the sizes of the plates 34.
  • the plates 34 In order to place the plates 34 at the proper level relative to the punches 31, they are mounted on and separated from each other by spacing bars 37.
  • FIGURE 7 illustrates diagrammatically a pressure mold for molding a preformed angular plastic strip 40 upon the angular lateral edge portion 41 of a plate 42 which is supported on a spacing bar 43 and the outer surfaces of which may again, as in all embodiments of the invention, be coated with sheets of plastic 44.
  • the edge surfaces of the softer inner parts of this edge portion 41 are precut so as to project beyond the planes 45, as indicated in dotted lines, to which they are to be compressed in order to make the surfaces of the entire angular edge portion of a substantially uniform compressive strength.
  • FIGURE 8 finally illustrates the method according to.
  • the compression mold essentially consists of a stationary part 59 with two heated abutments 60 secured to or integral with the stationary part 56 and facing the left edge portions 55 of workpieces 56,:and three heated punches 61 which are resiliently mounted on springs 62 or similar cushion means in the stationary part 56 and on or between the abutments 60 and are facing the left edge portions 55 of workpieces 57.
  • a ram 63 is slidable along the horizontal base of the stationary part 56 in the direction of arrow 64.
  • Ram 63 has three heated abutments 65 secured thereto or integral therewith which are disposed at the same levels as the punches 61 and face the right edge portions 55 of Workpiece 57, and it also carries two heated punches 66 which are slidable between the abut-ments 65 and are resiliently mounted on springs 67 or similar cushion means. These punches 66 are disposed at the same levels as the abutments 60 and face the right edge portions 55 of workpieces 56. For compressing the edge portions 55-of all workpieces 56 and 57 to a substantially uniform compressive strength, these edge portions are at first made of a convex shape similarly as the edge portion in FIGURE 1.
  • Punches 61 and 66 are acted upon by springs 62 and 67 respectively, for the same reason as described with reference to FIGURES 6 and 7, namely, for compensating for minor deviations in the length or width of workpieces 56 and 57.
  • the abutments 65 and punches 66 which are driven by ram 63 are staggered relative to abutments 60 and punches 61 for the sole purpose of accommodating the large-size springs 62 and 67 and of reducing the total height of the compression mold.
  • the compression mold By designing the compression mold accordingly, it would even be possible to compress and coat simultaneously the edge portions 55 at all four sides of the entire stack of workpieces.
  • the compression mold and the number of punches therein may also be enlarged to permit an even larger stack of workpieces to be compressed and coated simultaneously.
  • the molds may be designed so that the workpieces may be worked upon in an upright position rather than in a prone position as illustrated, and those according to FIGURES 6 and -8 may be standing side-by-side instead of lying above each other.
  • a method of uniformly bonding sheet material with a resin to the lateral surface of a compressed workpiece wherein the inner parts of said workpiece have a lower compressive strength than the outer parts thereof comprising the steps of: forming a convex surface on the lateral edge portion of said compressed workpiece; placing said sheet material adjacent said convex surface; compressing said sheet material onto said convex surface on said lateral edge portion with heat and pressure to form a flat 8 surface on said lateral edge portion to provide said lateral edge portion with substantially the same compressive strength as said outer parts and to uniformly migrate said resin into said lateral edge portion of said workpiece and bond uniformly said sheet material to the surface of'said lateral edge portion.
  • a method of uniformly bonding sheet material with a resin to the lateral surface of a compressed workpiece wherein the inner parts of said workpiece have a lower compressive strength than the outer parts thereof comprising the steps of: forming a fiat surface on the lateral edge, portion of said compressed workpiece; placing said sheet material adjacent said flat surface; compressing said sheet material onto said fiat surface on the lateral edge portion with heat and pressure to form a concave surface on said lateral edge portion to provide said lateral edge portion with substantially the same compressive strength as said outer parts and to uniform-1y migrate said resin into said lateral edge portion of said workpiece and uniformly bond said sheet material to the surface of said lateral edge portion.
  • a compression mold comprising at least one pressure element movable toward the surface of a lateral edge portion of a workpiece; a cushion member on said pressure element; a flexible pressure member on said cushion member adapted to bend under the pressure of said pressure element through said cushion member in accordance with pa-rts'of different compressive strength of said lateral edge portion of said workpiece being engaged by said flexible pressure member so as to provide said lateral edge portion with a substantially uniform compressive strength.
  • a compression mold comprising a plurality of pres
  • a compression mold adapted to receive a plurality of equal workpieces adjacent to each other for simultaneously compressing the lateral edge portions on at least two sides of each of said workpieces to a substantially uniform compressive strength of all said edge portions on said opposite sides; comprising, a plurality of movable pressure members each associated with one of said workpieces and all adapted to engage simultaneously with the lateral edge portions of all of said workpieces at the first of said opposite sides for compressing said lateral edge portions;

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Laminated Bodies (AREA)
US29545763 1951-01-28 1963-07-16 Method and apparatus for coating the edge portions of compressed workpieces Expired - Lifetime US3283052A (en)

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DE19511504239 DE1504239A1 (de) 1951-01-28 1951-01-28 Verfahren und Pressform zum Beschiehten von Kanten und Profilen

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JP (1) JPS4526989B1 (zh)
CA (1) CA761402A (zh)
DE (1) DE1504239A1 (zh)
FR (1) FR1433314A (zh)
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SE (1) SE307665B (zh)

Cited By (18)

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US3415708A (en) * 1964-11-10 1968-12-10 Plexowood Inc Table top
US3627864A (en) * 1969-10-17 1971-12-14 Melsur Corp Method of molding an article
US3687583A (en) * 1971-06-03 1972-08-29 Penetred Corp Art of forming tire treads with elongated traction-augmenting elements
US3902583A (en) * 1970-09-21 1975-09-02 Jerry Laibson Load bearing tray
US4038119A (en) * 1975-12-03 1977-07-26 Lambert Everette M Bead forming apparatus and method
US4170511A (en) * 1976-09-13 1979-10-09 Pace Incorporated Surface laminating machine
US4193830A (en) * 1976-09-13 1980-03-18 Pace Incorporated Method of surface laminating
US4247511A (en) * 1979-03-15 1981-01-27 Masonite Corporation Edge treatment for fibreboard panels and the like
US4343849A (en) * 1977-11-03 1982-08-10 Masonite Corporation Edge treatment for fibreboard panels and the like
US4922816A (en) * 1985-04-22 1990-05-08 Advanced Input Devices Double shuttle diffusion printer
US5427159A (en) * 1994-01-06 1995-06-27 Countertops, Inc. Countertop finishing apparatus
US5487802A (en) * 1991-01-09 1996-01-30 Fuji Photo Film Co., Ltd. Ultrasonic welding method and apparatus for molded resin materials
US6243931B1 (en) 1998-09-15 2001-06-12 Batesville Services, Inc. Casket lid and method and making same
US6554957B2 (en) * 2001-09-28 2003-04-29 Hewlett-Packard Development Company Self adjusting ultrasonic weld fixture
US20040244163A1 (en) * 1998-09-15 2004-12-09 Batesville Services, Inc. Casket lid and method of making same
ITVI20120283A1 (it) * 2012-10-25 2014-04-26 Massimo Storoni S R L Macchina per l'applicazione di un elemento di copertura ad una superficie di un materiale di base, metodo di applicazione e prodotto ottenuto.
EP3120991A1 (en) * 2015-07-24 2017-01-25 The Boeing Company Method and apparatus for applying a strip of material over an edge on a structure
US20230045926A1 (en) * 2019-12-20 2023-02-16 Homag Gmbh Trimming device, coating device, and method for trimming a narrow-surface coating material

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IT1034979B (it) * 1975-04-09 1979-10-10 Stefani Spa G Macchina incollatrice automatica ad avanzamento continuo per l in collaggio di rivestimenti in im piallacciatura di legno laminato plastico o altri materiali sintetici su bordi profilati di pannelli in legno o composizioni di le gnoo altri materiali sintetici
FR2490536A1 (fr) * 1980-09-25 1982-03-26 Ghanassia Josette Procede et dispositif pour fabriquer des placages annulaires en contre-plaque pour encadrer des meubles de forme arrondie
DE10028199C1 (de) * 2000-06-09 2002-06-13 Henkel Dorus Gmbh & Co Kg Andruckelement für eine Kantenanleimmaschine und Verfahren zum Anleimen
DE20308044U1 (de) * 2003-05-22 2003-08-07 Paul Ott Gmbh, Lambach Druckvorrichtung
DE102004025520A1 (de) * 2004-05-25 2005-12-15 SCHÜCO International KG Vorrichtung und Verfahren zum Aufbringen von Folie auf ein Bauelement
ITMO20070168A1 (it) * 2007-05-21 2008-11-22 Scm Group Spa Apparato e metodo per bordare pannelli e pannello composito bordato
DE102008022806A1 (de) * 2008-05-08 2009-11-12 Wolfgang Lacroix Leichtbauplatte sowie Verfahren zu deren Herstellung
DE102014003766A1 (de) * 2014-03-15 2015-09-17 Ima Klessmann Gmbh Holzbearbeitungssysteme Verfahren und Vorrichtung zur Herstellung einer Kantenkaschierung

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DE461125C (de) * 1928-06-13 Carl Warnecke Fa Aus einer aeusseren Papierumhuellung mit eingelegter Polsterfuellung bestehendes Polsterkissen zum Abpolstern von druckempfindlichen Waren und Warenpackungen
US1790178A (en) * 1928-08-06 1931-01-27 Jr Daniel Manson Sutherland Fibre board and its manufacture
US2184971A (en) * 1936-09-02 1939-12-26 Congoleum Nairn Inc Flexible smooth surface rug and method of making same
US2550455A (en) * 1946-09-23 1951-04-24 Nat Automotive Fibres Inc Trim panel and method of making the same
US2729010A (en) * 1955-02-28 1956-01-03 Aristocrat Leather Products In Ornamental sheet material and method of making the same
US2804419A (en) * 1955-07-14 1957-08-27 Beltx Corp Heat-sealing cloth and plastic
US2831527A (en) * 1952-04-24 1958-04-22 Sanitary Products Corp Method of applying a film tip to a tampon

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Publication number Priority date Publication date Assignee Title
DE461125C (de) * 1928-06-13 Carl Warnecke Fa Aus einer aeusseren Papierumhuellung mit eingelegter Polsterfuellung bestehendes Polsterkissen zum Abpolstern von druckempfindlichen Waren und Warenpackungen
US1790178A (en) * 1928-08-06 1931-01-27 Jr Daniel Manson Sutherland Fibre board and its manufacture
US2184971A (en) * 1936-09-02 1939-12-26 Congoleum Nairn Inc Flexible smooth surface rug and method of making same
US2550455A (en) * 1946-09-23 1951-04-24 Nat Automotive Fibres Inc Trim panel and method of making the same
US2831527A (en) * 1952-04-24 1958-04-22 Sanitary Products Corp Method of applying a film tip to a tampon
US2729010A (en) * 1955-02-28 1956-01-03 Aristocrat Leather Products In Ornamental sheet material and method of making the same
US2804419A (en) * 1955-07-14 1957-08-27 Beltx Corp Heat-sealing cloth and plastic

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3415708A (en) * 1964-11-10 1968-12-10 Plexowood Inc Table top
US3627864A (en) * 1969-10-17 1971-12-14 Melsur Corp Method of molding an article
US3902583A (en) * 1970-09-21 1975-09-02 Jerry Laibson Load bearing tray
US3687583A (en) * 1971-06-03 1972-08-29 Penetred Corp Art of forming tire treads with elongated traction-augmenting elements
US4038119A (en) * 1975-12-03 1977-07-26 Lambert Everette M Bead forming apparatus and method
US4170511A (en) * 1976-09-13 1979-10-09 Pace Incorporated Surface laminating machine
US4193830A (en) * 1976-09-13 1980-03-18 Pace Incorporated Method of surface laminating
US4343849A (en) * 1977-11-03 1982-08-10 Masonite Corporation Edge treatment for fibreboard panels and the like
US4247511A (en) * 1979-03-15 1981-01-27 Masonite Corporation Edge treatment for fibreboard panels and the like
US4922816A (en) * 1985-04-22 1990-05-08 Advanced Input Devices Double shuttle diffusion printer
US5487802A (en) * 1991-01-09 1996-01-30 Fuji Photo Film Co., Ltd. Ultrasonic welding method and apparatus for molded resin materials
US5427159A (en) * 1994-01-06 1995-06-27 Countertops, Inc. Countertop finishing apparatus
US6243931B1 (en) 1998-09-15 2001-06-12 Batesville Services, Inc. Casket lid and method and making same
US6503429B1 (en) 1998-09-15 2003-01-07 Batesville Services, Inc. Casket lid and method of making same
US20040244163A1 (en) * 1998-09-15 2004-12-09 Batesville Services, Inc. Casket lid and method of making same
US6849141B2 (en) 1998-09-15 2005-02-01 Batesville Services, Inc. Casket lid and method of making same
US6922877B2 (en) 1998-09-15 2005-08-02 Batesville Services, Inc. Casket lid and method of making same
US7147811B2 (en) 1998-09-15 2006-12-12 Batesville Services, Inc. Casket lid and method of making same
US7247264B2 (en) 1998-09-15 2007-07-24 Batesville Services, Inc. Casket lid and method of making same
US6554957B2 (en) * 2001-09-28 2003-04-29 Hewlett-Packard Development Company Self adjusting ultrasonic weld fixture
ITVI20120283A1 (it) * 2012-10-25 2014-04-26 Massimo Storoni S R L Macchina per l'applicazione di un elemento di copertura ad una superficie di un materiale di base, metodo di applicazione e prodotto ottenuto.
EP3120991A1 (en) * 2015-07-24 2017-01-25 The Boeing Company Method and apparatus for applying a strip of material over an edge on a structure
US10829667B2 (en) 2015-07-24 2020-11-10 The Boeing Company Method and apparatus for applying a strip of material over an edge on a structure
US20230045926A1 (en) * 2019-12-20 2023-02-16 Homag Gmbh Trimming device, coating device, and method for trimming a narrow-surface coating material

Also Published As

Publication number Publication date
DE1504239B2 (zh) 1974-05-16
DE1504239A1 (de) 1969-11-06
DE1504239C3 (zh) 1975-03-06
GB1050517A (zh) 1966-12-07
SE307665B (zh) 1969-01-13
FR1433314A (fr) 1966-04-01
JPS4526989B1 (zh) 1970-09-04
CA761402A (en) 1967-06-20

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