US2993520A - Machine for producing tube-shaped bodies from veneer sheets, especially barrel shells - Google Patents

Machine for producing tube-shaped bodies from veneer sheets, especially barrel shells Download PDF

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Publication number
US2993520A
US2993520A US761033A US76103358A US2993520A US 2993520 A US2993520 A US 2993520A US 761033 A US761033 A US 761033A US 76103358 A US76103358 A US 76103358A US 2993520 A US2993520 A US 2993520A
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United States
Prior art keywords
mandrel
casing
segments
machine
shaft
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Expired - Lifetime
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US761033A
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English (en)
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Thorkildsen Per
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Individual
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Individual
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Priority to NL230757D priority Critical patent/NL230757A/xx
Priority to GB25912/58A priority patent/GB837753A/en
Application filed by Individual filed Critical Individual
Priority to US761033A priority patent/US2993520A/en
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Publication of US2993520A publication Critical patent/US2993520A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27D—WORKING VENEER OR PLYWOOD
    • B27D1/00—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring
    • B27D1/04—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring to produce plywood or articles made therefrom; Plywood sheets
    • B27D1/08—Manufacture of shaped articles; Presses specially designed therefor
    • B27D1/086—Manufacture of oblong articles, e.g. tubes by spirally winding veneer blanks

Definitions

  • the present invention relates to a machine for producing tube-shaped bodies of veneer sheets or plywood, especially barrel shells, the machine being of the type comprising a shaft which is supported at one end and positively rotated, the other end of which carries an expandible mandrel, and a forming casing or shell consisting of two half parts which are hinged together and are provided with locking means so as to be closed and locked together, said mandrel or casing or both being provided with heating elements to develop heat for the hardening of the binder.
  • the segments forming the expandible mandrel comprise or are supported by a number of plungers operating radially in relation to the central axis of said mandrel and said shaft, which segments are acted upon by a pressure medium applied through the mandrel for expanding or contracting it.
  • FIG. 1 shows a machine in accordance with the invention, as seen from the front with a working table and a finishing or smoothing device removed,
  • FIG. 2 shows the machine of FIG. 1 in longitudinal cross section
  • FIG. 3 is a vertical cross section of the machine
  • FIG. 4 is a top plan view of the machine.
  • FIGS. 5 and 6 show details of the machine.
  • the machine shown in the drawings for the production of barrels or tubular bodies comprises a base 1 which is provided at one side with a support 2 provided with bearings 3 for supporting one half of a shaft 4 which is positively rotated by a belt wheel 5.
  • Belt wheel 5 is coupled with the shaft 4 by a cone clutch, the two members of which are numbered 6 and 7, respectively.
  • Shaft 4 is hollow and closed at one end (the right end inFIG. 2) whereas the other end is provided with a coupling 8 connected with a conduit for a pressure medium (not shown).
  • the other or free end of the hollow shaft carries a mandrel 11 normally enclosed by a forming shell or casing 9.
  • This shell consists of two half parts 9' and 9", the last mentioned one being rigidly connected with arms 18' the lower ends of which are hinged to the base plate 1 as will be described later on; the other half part 9' of the shell is hingedly connected with the firstnamed part by a hinge 30 and may be locked in closed position by a locking device 12, 17, 17".
  • the mandrel consists of three equal segments 11a, 11b and 110 each of which is supported by four plungers 37 and three parallel ribs 38 fixed to the plungers, so that the entire mandrel has twelve plungers in all.
  • These plungers 37 are arranged in short cylinders 39 rigidly connected with the hollow shaft 4 via short sleeves 41 through which the single cylinder spaces communicate with the inner hollow space of the shaft 4.
  • air or another suitable medium under pressure is introduced through the coupling 8
  • all the plungers are pressed outwardly in radial direction so as to force their respective segments 11 in a direction toward the inner wall of the shell 9.
  • the segments 11 are guided by guides 10.
  • heating elements 42, 44' and 44" are arranged in the segments Patented July 25, 1961 and in both halves of the shell 9, respectively, which elements may either be tube coils to be supplied with steam, or preferably electric resistance wires, with those forming the elements 44 and 44" being connected with an outer electric circuit via the terminal boxes 45' and '45, respectively.
  • the connection between the heating elements 42 and the outer electric circuit is via slip rings 34, the contact brushes of which are not shown in the drawings.
  • the longitudinal parallel edges of the segments 11 are provided with sawtoothed bars 64 and 65, the teeth 66 and 67 of which mesh with each other. This is to reduce denting of the innermost veneer sheet which has its fiber direction arranged parallel with the axis of the mandrel.
  • the half 9" of the shell 9 is carried by the base 1. Near each end of half 9", arms 18' protrude downwardly and are inclined in relation to the mean plane of the machine.
  • the two arms 18' are stiffened by stiffening bars or arms 30' as shown in FIG. 3.
  • Arms 18 are guided in channelled guides 18 forming parts of a rigid frame 18, 22, 35 which is connected with the rear side of the base 1 via lugs 23 and pins so as to be swung.
  • the angle of inclination of the frame and the arms 18 may be adjusted by screws 36 which are screwed into the foremost ends of bars 35 rigidly connected with the guide channels 18.
  • the displacement of the arms 18 in the guides 18 is hydraulically controlled by a cylinder 21 having a plunger.
  • This cylinder is fixed to the beam 22 interconnecting the lower ends of the channelled guides 18.
  • the plunger rod 20 is connected with the arms 18' via a cross beam 19, as seen in FIG. 1.
  • the entire system consisting of the arms 18, 30', the beam 19, and the plunger rod 20, as well as the shell 9, may be moved to and from the mandrel 11 when the half 9 of the shell has been swung away from the mandrel about the hinge 30.
  • the system is also under the influence of one or two other hydraulic cylinders 32 which are swingably connected with the base 1 at 34 and the plunger rod 31 of which is connected with one of the stiffening bars 30. Between the cylinder 32 and the plunger rod 31 is arranged a helical spring 33 serving to damp shocks.
  • FIG. 2 also shows the driving means for the shaft 4 in the form of an electric motor 29 disposed interiorly of the support 2 and connected with a belt wheel 27 via a belt 28.
  • Wheel 27 drives another belt wheel 26 via a worm gearing 25, and wheel 26 rotates the shaft 4 via the belt wheel 5 and a belt 24.
  • the clutch 6, 7 is shown as an ordinary cone friction clutch which is, in the present case, preferably hydraulically operated.
  • the locking means for the shell consists of a rod 12 and hinge parts 17 and 17" rigidly connected with the two halves 9 and 9", respectively.
  • This locking means is hydraulically operated.
  • the rod 12 forms the outer end of a rod of a piston disposed in a cylinder 13 which is connected with a pressure source through the tube 16, a valve 17, and tubes 14 and 15 connected with each one end of the cylinder 13.
  • This cylinder and the tubes 14 and 15 are supported by brackets 13' fixed to the front side of the support 2, as seen in FIGS. 1 and 4.
  • a table 56 upon which the veneer sheets are placed before they are wrapped on the mandrel.
  • a slicing and finishing machine for the hardened barrel body is arranged on a carriage 48 sliding on rails 47v supported on posts 46 fixed to the base plate 1.
  • a motor 50 which, via a belt 51, rotates a shaft 52 arranged for rotation in bearings "52.
  • a cutting-off saw blade 54 To each end of the shaft is secured a cutting-off saw blade 54 and between the blades 54 are arranged six milling cutters 53.
  • the carriage 48 is moved on the rails 47 hydraulically or pneumatically, controlled by means of a cylinder "55 which is connected with a pipe.
  • the veneer sheets are first placed upon one another on the table 56 with alternate fiber direction, either in the form of a stack or preferably, if the barrel body is to be formed of, for instance, five layers, a set of three sheets connected together by paper strips or the like; and upon said three layers two additional layers are placed.
  • a suitable binder is applied to the layers.
  • the forming casing 9 is open and pulled back with the half 9' swung away from the mandrel.
  • the front end of the veneer pack or of the connected sheets is introduced between two of the segments and then the mandrel is rotated by means of the clutch 6, 7 which is operated pneumatically so as to couple the shaft 4 with the belt wheel 5 continuously driven from the motor 29, FIG. 2.
  • the veneer sheets are wrapped on the mandrel, followed by four veneer strips which are to form girths and end-reinforcements of the barrel body.
  • the veneer strips are connected with their front ends to the rear edge of the veneer pack or sheets connected together so as to form a combined piece of material to be wrapped upon the mandrel in one continuous operation.
  • the shell has four peripheral grooves 58 and 59 in its inner wall for taking up the veneer strips which form the girths and the end-reinforcements of the barrel.
  • pressure is applied to the inner space of the shaft 4 through the coupling 8 so that the plungers 37 are pressed outwardly in radial direction to carry with them the segments 11a, 11b and 11c forming the mandrel 11; consequently the segments are pressed against the inner wall of the shell with the wrapped veneer sheets disposed therebetween.
  • the outer ends of 'the segments 11 are preferably' slightly conical and are rifled in the peripheral direction to form a frusto conical rifled portion 62 at each end of the barrel body, as shown in FIG. 5. These rifled end portions serve the purpose of keeping the bottom and the lid of the barrels in place after they have been applied. As soon as the segments have reached their outermost position pressed tightly against the inner side of the veneer pack, heat is applied to the mandrel 11 and to the casing 9 by the heating elements .42, 44 and 44" connected with an external electric circuit.
  • the rod' 12 is withdrawn by supplying a pressure medium to the cylinder '13 through the tube 14, whereupon the half 9' of the casing is swung away from the mandrel and the entire casing is retracted.
  • the pressure medium is suppartly hardened veneer shell on it.
  • the motor 50 also rotates, driving the shaft 52 with the tools 53 and 54.
  • the saw blades 54 will cut off both ends 63 of the barrel body 60 (FIG. 5).
  • the milling cutters 53 will mill off the sharp edges of the girths and the reinforcing bands.
  • One of these reinforcing bands '61 is shown in FIG. 5 after the corresponding milling tool has milled off the inner edge.
  • the carriage 48 is again withdrawn, whereupon the pressure in the inner of the shaft 4 and the cylinders 39 isreleased so that the segments 11 are moved back to their initial position.
  • the barrel body may now be pulled off the mandrel and needs to be interiorly milled near the edges to remove the dents or bumps at the places corresponding to the openings between the teeth 66 and 67, as seen in FIG. 6.
  • a machine for producing tube-shaped bodies from laminated sheets comprising, in combination, a rotatable shaft carrying at one end an expansible mandrel, a forming casing defined by two hinged halves disposed around said mandrel in spaced relation thereto, said casing being openable to permit entry of the laminated sheets into engagement with said mandrel, and said mandrel being defined by a plurality of circumferentially adjacent segments, and fluid actuatable pistons supporting said segments and carried by said shaft, said shaft containing a conduit for supplying fluid to said pistons to cause said segments to move radially outwardly toward the interior surface of said casing, and means for holding said casing closed.
  • a machine for producing tube-shaped bodies from laminated sheets comprising, in combination, a rotatable shaft carrying at one end an expansible mandrel, a forming casing defined by two hinged halves disposed around said mandrel in spaced relation thereto, said casing being openable to permit entry of the laminated sheets into engagement with said mandrel, and said mandrel being defined by a plurality of circumferentially' adjacent segments, and fluid actuatable pistons supporting said segments and carried by said shaft, said shaft containing a conduit for supplying fluid to said pistons to cause said segments to move radially outwardly toward the interior surface of said casing, and at least one of said mandrel and said casing being provided with heating means, and means for holding said casing closed.
  • a machine for producing tube-shaped bodies from laminated sheets comprising, in combination, .a rotatable shaft carrying at one end an expansible mandrel, a forming casing defined by two hinged halves disposed around said mandrel in spaced relation thereto, said casing being formed with annular grooves on its inner surface and being openable to permit entry of the laminated sheets intoengagement with said mandrel, and said mandrel being defined by a plurality of circumferentially adjacent segments and fluid actuatable pistons supporting said segments, and carried by said shaft, said shaft containing a conduit for supplying fluid to said pistons to cause said segments to move radially outwardly toward the interior surface of said casing, and at least one of said mandrel and said casing being provided withheating means, and means for holding said casing closed.
  • a machine for producing tube-shaped bodies from laminated sheets comprising, in combination, a rotatable shaft carrying at one end an expansible mandrel, a forming casing defined by two hinged halves disposed around said mandrel in spaced relation thereto, said casing being openable'to permit entry of the 'laminanted sheets into engagement with said mandrel and said mandrel being defined by a plurality of circumferentiallyadjacent segments and fluid actuatable pistons supporting said segments and carried by said shaft, said shaft containing a conduit for supplying fluidto said pistons to cause said segments to move radially outwardly toward the interior surface of said casing, and the ends of said segments each having' a conical enlargement, and means for holding said casing closed.
  • a machine for producing tube-shaped bodies from laminated sheets comprising, in combination, a rotatable shaft carrying at one end an expansible mandrel, a forming casing defined by two hinged halves disposed around said mandrel in spaced relation thereto, said casing being openable to permit entry of the laminated sheets into engagement with said mandrel, and said mandrel being defined by a plurality of circumferentially adjacent segments and fluid actuatable pistons supporting said segments, and carried by said shaft, said shaft containing a conduit for supplying fluid to said pistons to cause said segments to move radially outwardly toward the interior surface of said casing, and the ends of said segments each having a conical enlargement which is rifled peripherally, and means for holding said casing closed.
  • a machine for producing tube-shaped bodies from laminated sheets comprising, in combination, a rotatable shaft carrying at one end an expansible mandrel, a forming casing defined by two hinged halves disposed around said mandrel in spaced relation thereto, said casing being openable to permit entry of the laminated sheets into engagement with said mandrel, and said mandrel being defined by a plurality of circumierentially adjacent segments and fluid actuatable pistons supporting said segments, and carried by said shaft, said shaft containing a conduit for supplying fluid to said pistons to cause said segments to move radially outwardly toward the interrior surface of said casing, the ends of said segments each having a conical enlargement which is rifled peripherally, and at least one of said mandrel and said casing being provided with heating means, and means for holding said casing closed.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Making Paper Articles (AREA)
  • Rigid Containers With Two Or More Constituent Elements (AREA)
US761033A 1958-08-12 1958-09-15 Machine for producing tube-shaped bodies from veneer sheets, especially barrel shells Expired - Lifetime US2993520A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
NL230757D NL230757A (en:Method) 1958-08-12
GB25912/58A GB837753A (en) 1958-08-12 1958-08-12 Method of producing tube-shaped bodies from veneer sheets, especially barrel shells
US761033A US2993520A (en) 1958-08-12 1958-09-15 Machine for producing tube-shaped bodies from veneer sheets, especially barrel shells

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GB25912/58A GB837753A (en) 1958-08-12 1958-08-12 Method of producing tube-shaped bodies from veneer sheets, especially barrel shells
US761033A US2993520A (en) 1958-08-12 1958-09-15 Machine for producing tube-shaped bodies from veneer sheets, especially barrel shells

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3052379A1 (fr) * 2016-06-13 2017-12-15 Univ Bordeaux Procede d'assemblage de bois deroule en forme de tube et produits issus du dit procede

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2443548C2 (ru) * 2010-05-28 2012-02-27 Государственное образовательное учреждение высшего профессионального образования "Тихоокеанский государственный университет" Способ изготовления стенового материала

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1022970A (en) * 1911-01-06 1912-04-09 Willard J Ott Veneer-barrel-making machine.
US1501593A (en) * 1923-03-08 1924-07-15 Inland Mfg Co Coiled rim and method of making it
US1507323A (en) * 1923-08-29 1924-09-02 Inland Mfg Co Coiling machine
US2353134A (en) * 1939-03-24 1944-07-11 William R Anderson Method of manufacturing barrels
US2365754A (en) * 1942-02-12 1944-12-26 Clarence U Gramelspacher Plywood barrel
US2411687A (en) * 1944-07-24 1946-11-26 Harold V James Tire retreading device
US2460845A (en) * 1944-07-14 1949-02-08 Sun Rubber Co Form for building hollow articles
US2616463A (en) * 1945-07-14 1952-11-04 Haskelite Mfg Corp Apparatus for fabrication of plywood tubing
US2655187A (en) * 1949-03-29 1953-10-13 I S Interply Means for producing tubular bodies from wood by coiling up veneer sheets
US2678677A (en) * 1945-10-31 1954-05-18 David E Hervey Tube forming apparatus
US2840856A (en) * 1952-10-18 1958-07-01 Honeywell Regulator Co Molding apparatus and procedure
US2892749A (en) * 1956-06-04 1959-06-30 Greif Bros Cooperage Corp Method and apparatus for contracting and compressing fibre shells

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1022970A (en) * 1911-01-06 1912-04-09 Willard J Ott Veneer-barrel-making machine.
US1501593A (en) * 1923-03-08 1924-07-15 Inland Mfg Co Coiled rim and method of making it
US1507323A (en) * 1923-08-29 1924-09-02 Inland Mfg Co Coiling machine
US2353134A (en) * 1939-03-24 1944-07-11 William R Anderson Method of manufacturing barrels
US2365754A (en) * 1942-02-12 1944-12-26 Clarence U Gramelspacher Plywood barrel
US2460845A (en) * 1944-07-14 1949-02-08 Sun Rubber Co Form for building hollow articles
US2411687A (en) * 1944-07-24 1946-11-26 Harold V James Tire retreading device
US2616463A (en) * 1945-07-14 1952-11-04 Haskelite Mfg Corp Apparatus for fabrication of plywood tubing
US2678677A (en) * 1945-10-31 1954-05-18 David E Hervey Tube forming apparatus
US2655187A (en) * 1949-03-29 1953-10-13 I S Interply Means for producing tubular bodies from wood by coiling up veneer sheets
US2840856A (en) * 1952-10-18 1958-07-01 Honeywell Regulator Co Molding apparatus and procedure
US2892749A (en) * 1956-06-04 1959-06-30 Greif Bros Cooperage Corp Method and apparatus for contracting and compressing fibre shells

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3052379A1 (fr) * 2016-06-13 2017-12-15 Univ Bordeaux Procede d'assemblage de bois deroule en forme de tube et produits issus du dit procede

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GB837753A (en) 1960-06-15

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