US3280866A - In-line veneer production method - Google Patents

In-line veneer production method Download PDF

Info

Publication number
US3280866A
US3280866A US315248A US31524863A US3280866A US 3280866 A US3280866 A US 3280866A US 315248 A US315248 A US 315248A US 31524863 A US31524863 A US 31524863A US 3280866 A US3280866 A US 3280866A
Authority
US
United States
Prior art keywords
veneer
dryer
conveyor
storage trays
conveying
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US315248A
Other languages
English (en)
Inventor
Harold E Erickson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Weyerhaeuser Co
Original Assignee
Weyerhaeuser Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Weyerhaeuser Co filed Critical Weyerhaeuser Co
Priority to US315248A priority Critical patent/US3280866A/en
Priority to IL22101A priority patent/IL22101A/en
Priority to DE19641453333 priority patent/DE1453333A1/de
Priority to GB41081/64A priority patent/GB1079049A/en
Priority to SE12114/64A priority patent/SE314185B/xx
Priority to BE654227D priority patent/BE654227A/xx
Priority to DK501664AA priority patent/DK107705C/da
Priority to US540796A priority patent/US3566937A/en
Priority to DK481266AA priority patent/DK113175B/da
Application granted granted Critical
Publication of US3280866A publication Critical patent/US3280866A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27L—REMOVING BARK OR VESTIGES OF BRANCHES; SPLITTING WOOD; MANUFACTURE OF VENEER, WOODEN STICKS, WOOD SHAVINGS, WOOD FIBRES OR WOOD POWDER
    • B27L5/00—Manufacture of veneer ; Preparatory processing therefor
    • B27L5/002—Wood or veneer transporting devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B13/00—Machines and apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement
    • F26B13/10—Arrangements for feeding, heating or supporting materials; Controlling movement, tension or position of materials
    • F26B13/101—Supporting materials without tension, e.g. on or between foraminous belts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
    • F26B25/22—Controlling the drying process in dependence on liquid content of solid materials or objects
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B2210/00—Drying processes and machines for solid objects characterised by the specific requirements of the drying good
    • F26B2210/14—Veneer, i.e. wood in thin sheets
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B2210/00—Drying processes and machines for solid objects characterised by the specific requirements of the drying good
    • F26B2210/16—Wood, e.g. lumber, timber

Definitions

  • veneers are clipped wider than the finished sheet in order to account for .an indefinite amount of shrinkage and sorted before they are dried. Sorting is done visually and is determined by the amount and size of knotholes, splits and rough surface and also by rough estimates of moisture content. Such moisture content is difiicult to estimate while the veneer is still wet and before it passes through a dryer. Effective instruments for this purpose are not presently available. Thus, several veneer sheets are clipped improperly since they contain both relatively wet and relatively dry portions in one sheet. When such a sheet passes through the dryer at a sufficient speed to dry out the wet portion of the sheet, the dry portion becomes overdry and the resulting damage degrades the veneer and results in a lower commercial grade veneer.
  • the sheets of veneer are passed through the dryer in the prior art systems with the long axis of the veneer grain lengthwise to its path through the dryer.
  • This is termed lengthwise drying and includes the drying of wood veneers in which the veneer passes through the dryer with its grain lengthwise of its direction of travel.
  • This is in distinction from crosswise drying which includes the drying of wood veneers in which the veneer passes through the dryer with its grain crosswise of its direction of travel.
  • Another object is to produce softwood veneers which are clipped and graded after passing through a dryer without the loss of veneer due to oversized clipping allowing for an indeterminate indefinite amount of shrinkage.
  • Another object is to provide a veneer production process wherein the veneer which has passed through the dryer is accurately sensed for moisture content such that veneer which requires additional drying is accurately detected and can be separated from veneer which has had sufiicient drying.
  • Another object is to provide a veneer production process which includes a means for peeling a log and storing the peeled veneer in suflicient amounts to feed a dryer for crosswire drying in a continuous manner wherein there is a minimum of gap through the dryer between portions of the peeled veneer.
  • Another object is to provide a veneer process which saves valuable grades of softwood veneer from overdrying by delaying the grading process until after a drying step.
  • FIGURES 1A to 1C are side elevation views of the general arrangement of an in-line veneer production apparatus
  • FIGURE 2 is a slightly enlarged view of the center portion of the in-line veneer apparatus.
  • the in-line veneer production apparatus 1 which comprises a peeling station 3 ribbon storage trays 20, waste clipper section 30, dryer storage trays 40, dryer feeder 50, dryer 60, and gradingclipping section 70.
  • the peeling station 3 provides the means for bringing logs 4 by feed conveyor 5 and log handling equipment 7 to the lathe 8.
  • Logs 4 are positioned vertically in line with axis of the chucks 9 by charger calipers 10 or other suitable positioning means. Logs 4 are then grasped by charger arms (not shown) which carry the log 4 forward to align the log axis with the chuck axis.
  • Lathe 8 supports the logs 4 by means of chucks 9 which grasp the ends of the log when it is centered in the lathe 8.
  • logs 4 are rotated at a varying speed so that as the peeling knife 11 is placed against the surface of the log 4, the cut material which will be taken off by the peeling knife 11 in the form of veneer, often referred to as the ribbon, can leave the lathe area at a constant speed. In this way, as the log 4 is reduced in diameter as it rotates past peeling knife 11, the speed of its rotation is increased to maintain the same veneer speed.
  • the cuts which are taken by the peeling knife 11 are not continuous and are generally too rough and broken to be used as veneer.
  • Such rough-cut waste 13 is conveyed by means of conveyor gate 14 to a waste chute 15 where it is further conveyed by means of chipper conveyor 16 to be made into wood chips.
  • the desired product of the peeling process is the veneer 18 which is conveyed over conveyor gate 14 to tipples 19 which directs the ribbon of veneer 18 into the ribbon storage trays 20.
  • the ribbon storage trays consist of an upper and lower section 21, 22 of four of conveyor belts for each section, which can convey the ribbon of veneer 18 from the peeling station 3 such that as the first level of the upper section 21 becomes full from end to end, the tipples 19 drop down to a lower level until that level of the conveyor belts also becomes full from end to end and this process continues from the upper section 21 to the lower section 22.
  • the conveyor belts at each of these levels travel until that length of conveyor is completely filled from end to end with a ribbon of veneer or until the storage tray level is emptied int-o the next station in the in-line veneer apparatus.
  • the storage trays 20 provide a means for carrying the ribbon of veneer 18 as it is cut from the logs 4 and to have it, in an abundant supply ready for the next step in the processing of the veneer, yet not requiring any handling equipment, such as fork-lift trucks or bins or other means for carrying the ribbon from one part of a veneering plant to another.
  • the veneer 18 is discharged from the ribbon storage trays 20 by means of ribbon storage discharge conveyor 24 which passes the veneer 18 from the ribbon storage trays 20 to the waste clipper section 30.
  • Waste clipper operators inspect the ribbon 18 as it is conveyed from the storage trays 20 and use the clippers, the upper clipper 31 and the lower clipper 32, depending on the path of the veneer, to cut away large unusable sections of the peeled veneer which are not worth passing through the drying process.
  • the usable veneer is conveyed from the clippers 31, 32 by an overhead vacuum conveyor.
  • the clipped unusable veneer 34 is separated from the vacuum conveyor by a scraping or other suitable means dropping it to the waste conveyor 35 which carries it to a chipper feed conveyor 16.
  • the dryer storage trays 40 are similar in construction to the ribbon storage trays 20 and comprise an upper section 41 and a lower section 42, each section consisting of four levels of convey-or belts, which are fed by means of the waste clipper upper discharge conveyor 38 and the waste clipper lower discharge conveyor 39 from the waste clipper section 30.
  • This second set of storage trays is provided so that an abundant source of peeled material can be stored prior to conveying it to the dryer system. By having this abundant supply of ribbon veneer 18 there is no need for handling equipment such as forklift trucks, carts or other means of carrying the ribbon from the waste clipper section 30 to the dryer section 60.
  • the ribbon veneer 18 is fed by means of dryer storage upper discharge conveyor and dryer storage lower discharge conveyor 46 to dryer feed conveyor 50, best seen in FIGURE 2.
  • the upper dryer feeder conveyor 51 receives the ribbon from the dryer storage upper discharge conveyor 45 and conveys it to the upper dryer conveyor run 66.
  • the lower dryer feeder conveyor 52 receives the ribbon of veneer 18 from the dryer storage lower discharge conveyor 46 and conveys it to the lower dryer conveyor run 68.
  • the dryer feeder is operated so that there is a constant unbroken line of veneer material supplied to the dryer so that none of the dryer volume is wasted by gaps in the material which is to pass through it. This is accomplished by feeding the dryer 60 from the dryer storage trays 40 in such a way that even if there are gaps in the storage trays, the storage tray conveyors can be accelerated in speed in relation to the speed of the dryer and thus fill in any gaps that otherwise might occur in the dryer line. Also, since there are several layers of storage in the dryer storage trays 40 in relation to the two layers of dryer conveyor line, it is possible to keep the dryer 60 completely filled at all times.
  • the dryer 60 consists of a long, low, self-enclosed dryer housing 61 which contains conveyors running from one end to the other which carry the peeled veneer through the dryer heating sections 62 to the dryer cooling section 63. Extending from above the dryer housing 61 .are dryer exhaust stacks 65 for carrying away the excess moisture from the dryer housing.
  • the conveyors for the veneer consist of an upper dryer conveyor 66 and a lower dryer conveyor 68.
  • the lower dryer conveyor 68 is fed veneer 18 from the lower dryer feed conveyor 52 and the upper dryer conveyor 66 is fed veneer 18 from the upper dryer feed conveyor 51.
  • the dryer 60 has an air handling system for directing heated air onto the surfaces of the veneer 18 and thus dries the veneer as it transits the dryer.
  • the cooling section 63 directs cool air onto the surfaces of the veneer 18 in order to cool the surfaces of the veneer for later handling.
  • the veneer 18 passes to the grading-clipping section 70 with the discharge from the upper dryer conveyor 66 being conveyed to the upper moisture meter and marker 71 which automatically senses the moisture content of the veneer 18 and if it exceeds a predetermined moisture content, marks the edge of the veneer so that the grading-clipper operator has an indication of what veneer is acceptable for immediate use and what veneer will require a further pass through the dryer.
  • the veneer which is discharged from the lower dryer conveyor 68 is conveyed to the lower moisture meter and marker 72. Once the moisture content has been determined a grading-clipper operator looks over the veneer to give it an over-all grade.
  • the upper and lower grading clippers 75 and 77 respectively are actuated to cut the ribbon of veneer 18 into the exact sizes needed according to the grade given by the grading-clipper operator. If the edge of the veneer is marked indicating that the moisture content is excessive, the grading-clipper operator may cut the ribbon as close as possible to the beginning of the marked area and in this way salvage as much dry veneer as possible. Since the Wetter sections which must be redried may continue to shrink as they pass again through the dryer, the grading-clipper operator has a delay switch which adds a percentage to the standard size to allow for shrinkage. From the grading station 70 the veneer which has been cut to size by the upper or lower grading clippers 75, 77, is conveyed to sorting table 79 and placed in sorted stacks 80 for further processing.
  • the first storage trays 20' may be loaded at one level of the conveyors of the upper section 21 at a speed of veneer travel of 8000 feet per minute. Tray loading may stop entirely during the loading of a new log 4 onto the lathe 8, then loading speed may increase after the rough-cut waste 13 has been removed from the log. At the same time another level of the upper section 21 and one level conveyor of the lower section 22 of the storage trays 20 may be off-loading through the waste clipper section 30 at up to 300 feet per minute which may slow down as the waste clipper operator clips away unusable sections of peeled veneer.
  • the veneer passes through the waste clipper section 30 from the storage trays 20 it can feed the upper or lower sections 41, 42 of the dryer storage trays 40* at a speed as high as 300 feet per minute.
  • the other conveyor levels of the dryer storage trays 40 may be feeding veneer to the dryer feed conveyors 50' so that the dryer can be continuously operated at drying speed.
  • the first method of drying is to pass all veneers 18, from one log whether from the outer portion, i.e., the sap portion of the log, or from the inner portion, i.e., the heart portion of the log, through whichever line of the dryer is convenient. That portion of the veneer which is not completely dry as it passes through the moisture meters 71, 72 is indicated before final clipping. The grading-clipper operator may then clip with respect to moisture content as well as grade. Those sheets of veneer which have not been adequately dried can be recirculated by means of the lower redry feeder 37 and the upper redry feeder 54 or through another dryer.
  • the second alternate method of operation would pass all of the veneers from the sap portion of one log to one-half of the dryer storage trays 40, thence into one line of the dryer for drying at one rate.
  • the balance of the veneer would be sent to the other half of the dryer storage trays and to the other line of the dryer for drying at another rate. In either case the veneers are clipped after the majority of the shrinkage has taken place.
  • the logs 4 are first hauled into the peeling station 3 and peeled by a lathe 8, the resulting veneers 18 are fed into upper and lower sections 21 and 22 of ribbon storage trays 20, the veneers 18 pass from the storage trays 20 to a waste clipper section 30 that eliminates unusable veneer and from there the veneers 18 are reassembled in dryer storage trays 40.
  • the veneers 18 are fed directly into a conveyor-type dryer 60 where it is dried and conveyed through moisture meters 71, 72 and through grading clippers 75, 77 where the veneers 18 are clipped according to their moisture content and veneer grade.
  • the veneers are then sorted at sorting table 79 and those which are sufiiciently dry are used to make plywood or other lumber products and those which are too set for immediate use are recirculated through the redry conveyors 37, 54, or to another dryer.
  • An in-line veneer production process comprising the following steps:
  • said veneer is conveyed through said dryer with the veneers grain crosswire to its direction of travel.
  • An in-line veneer production process comprising the following steps:
  • the clipping step (k) is to exact size for those sheets of veneer which have a moisture content below a predetermined range as indicated by the marking which was performed in step (i).
  • An in-line veneer production process comprising the following steps:

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Textile Engineering (AREA)
  • Veneer Processing And Manufacture Of Plywood (AREA)
  • Drying Of Solid Materials (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)
  • Manufacture Of Wood Veneers (AREA)
US315248A 1963-10-10 1963-10-10 In-line veneer production method Expired - Lifetime US3280866A (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
US315248A US3280866A (en) 1963-10-10 1963-10-10 In-line veneer production method
IL22101A IL22101A (en) 1963-10-10 1964-09-18 Production of veneer
DE19641453333 DE1453333A1 (de) 1963-10-10 1964-09-30 Verbund-Furnierherstellungsverfahren und -einrichtung
SE12114/64A SE314185B (da) 1963-10-10 1964-10-08
GB41081/64A GB1079049A (en) 1963-10-10 1964-10-08 In-line veneer production process and apparatus
BE654227D BE654227A (da) 1963-10-10 1964-10-09
DK501664AA DK107705C (da) 1963-10-10 1964-10-10 Fremgangsmåde ved fremstilling af finér og anlæg til udøvelse af fremgangamåden.
US540796A US3566937A (en) 1963-10-10 1966-04-06 Inline veneer production system
DK481266AA DK113175B (da) 1963-10-10 1966-09-16 Fremgangsmåde ved fremstilling af finér.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US315248A US3280866A (en) 1963-10-10 1963-10-10 In-line veneer production method

Publications (1)

Publication Number Publication Date
US3280866A true US3280866A (en) 1966-10-25

Family

ID=23223538

Family Applications (1)

Application Number Title Priority Date Filing Date
US315248A Expired - Lifetime US3280866A (en) 1963-10-10 1963-10-10 In-line veneer production method

Country Status (7)

Country Link
US (1) US3280866A (da)
BE (1) BE654227A (da)
DE (1) DE1453333A1 (da)
DK (2) DK107705C (da)
GB (1) GB1079049A (da)
IL (1) IL22101A (da)
SE (1) SE314185B (da)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3447579A (en) * 1967-03-27 1969-06-03 Weyerhaeuser Co Reverse pass in-line veneer production system
US3935888A (en) * 1972-11-11 1976-02-03 C.L.P. Fleck Sohne Gmbh Manufacture of veneer sheets
US5385185A (en) * 1993-08-30 1995-01-31 Calvert Manufacturing, Inc. Round up control system for veneer lathe
WO2009001136A3 (en) * 2007-06-26 2009-04-02 Biojoule Ltd Drying particulate biomass
US9365365B2 (en) 2011-08-31 2016-06-14 Ventek, Inc. Wood veneer diverter and processing system

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107238266A (zh) * 2017-07-14 2017-10-10 苏州市中翼玛机械有限公司 一种具有温湿度控制功能的s型薄木干燥机
CN111687044B (zh) * 2020-06-20 2022-11-22 塔江建设有限公司 一种建筑工程用沙石离心筛分设备
CN114739141B (zh) * 2022-05-10 2022-11-25 江苏一澜智能科技有限公司 一种化纤丝自动烘干装置

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US647625A (en) * 1899-07-27 1900-04-17 David Gilmour Lumber.
US1767539A (en) * 1926-11-30 1930-06-24 Masonite Corp Process of making composition boards and the like and apparatus therefor
US1869210A (en) * 1929-02-16 1932-07-26 Coe Mfg Co Automatic unloader for driers
US1903102A (en) * 1930-10-31 1933-03-28 Daniel Manson Sutherland Jr Fiber board manufacture and apparatus therefor
US2829340A (en) * 1952-05-19 1958-04-01 Lippke Paul Arrangement for measuring the humidity of moving webs of material
US2844174A (en) * 1954-07-07 1958-07-22 Chicago Mill & Lumber Co Apparatus for making paper-covered wood veneer
FI32503A (fi) * 1958-12-30 1962-04-16 Kaukas Ab Oy Laitelma puuviilun siirtämiseksi viilusorvilta edelleen käsiteltäväksi
US3044508A (en) * 1959-03-02 1962-07-17 Weyerhaeuser Co Mark sensing lumber defect cutter
US3199555A (en) * 1963-03-06 1965-08-10 Hildebrand Robert Apparatus for producing and drying veneers

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US647625A (en) * 1899-07-27 1900-04-17 David Gilmour Lumber.
US1767539A (en) * 1926-11-30 1930-06-24 Masonite Corp Process of making composition boards and the like and apparatus therefor
US1869210A (en) * 1929-02-16 1932-07-26 Coe Mfg Co Automatic unloader for driers
US1903102A (en) * 1930-10-31 1933-03-28 Daniel Manson Sutherland Jr Fiber board manufacture and apparatus therefor
US2829340A (en) * 1952-05-19 1958-04-01 Lippke Paul Arrangement for measuring the humidity of moving webs of material
US2844174A (en) * 1954-07-07 1958-07-22 Chicago Mill & Lumber Co Apparatus for making paper-covered wood veneer
FI32503A (fi) * 1958-12-30 1962-04-16 Kaukas Ab Oy Laitelma puuviilun siirtämiseksi viilusorvilta edelleen käsiteltäväksi
US3044508A (en) * 1959-03-02 1962-07-17 Weyerhaeuser Co Mark sensing lumber defect cutter
US3199555A (en) * 1963-03-06 1965-08-10 Hildebrand Robert Apparatus for producing and drying veneers

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3447579A (en) * 1967-03-27 1969-06-03 Weyerhaeuser Co Reverse pass in-line veneer production system
US3935888A (en) * 1972-11-11 1976-02-03 C.L.P. Fleck Sohne Gmbh Manufacture of veneer sheets
US5385185A (en) * 1993-08-30 1995-01-31 Calvert Manufacturing, Inc. Round up control system for veneer lathe
WO2009001136A3 (en) * 2007-06-26 2009-04-02 Biojoule Ltd Drying particulate biomass
US9365365B2 (en) 2011-08-31 2016-06-14 Ventek, Inc. Wood veneer diverter and processing system

Also Published As

Publication number Publication date
BE654227A (da) 1965-04-09
DK107705C (da) 1967-06-26
IL22101A (en) 1968-04-25
SE314185B (da) 1969-09-01
DK113175B (da) 1969-02-24
DE1453333A1 (de) 1969-08-21
GB1079049A (en) 1967-08-09

Similar Documents

Publication Publication Date Title
US3566937A (en) Inline veneer production system
US5088533A (en) Method and device for the production of wood sheets from cut wood
US3280866A (en) In-line veneer production method
CN109702843A (zh) 免漆膜压木门的流水生产线
JP2875313B2 (ja) 挽き材から薄板を製造する方法及び装置
US3545094A (en) Multiple-dryer system for veneer and like material having widely varying moisture content
EP0185397A1 (en) Method for sawing a tree trunk and for treating a uniformly thick slice of wood sawn off the trunk
US4069851A (en) Method and apparatus for processing logs
US3750727A (en) Small wood sawmill
US3447579A (en) Reverse pass in-line veneer production system
CN212498150U (zh) 一种木材加工一体设备
US2615484A (en) Production of sticks
US3199555A (en) Apparatus for producing and drying veneers
US3434221A (en) Redry veneer drying method and apparatus
NO120292B (da)
CN110936442A (zh) 一种木材加工一体设备
US3591927A (en) Secondary dryer for veneer and like material
FI54239C (fi) Foerfarande och anordning vid sortering av saovael faerskt som torkat saogat virke
SU1604614A1 (ru) Способ измельчени древесных отходов в щепу
SE507848C3 (sv) Foerfarande och anlaeggning foer jaemning och sortering av faersk och torr saagvara
CA1072419A (en) Method and apparatus for processing logs
JPS58212904A (ja) 横はぎ単板の裁断方法
JPH06297411A (ja) 木材の乾燥方法
JPH11207707A (ja) 乾燥単板の含水別横はぎ処理方法
JPH0655506A (ja) 合板用単板の製造方法