US3856271A - Mixing device for gluing wood shavings - Google Patents
Mixing device for gluing wood shavings Download PDFInfo
- Publication number
- US3856271A US3856271A US00318648A US31864872A US3856271A US 3856271 A US3856271 A US 3856271A US 00318648 A US00318648 A US 00318648A US 31864872 A US31864872 A US 31864872A US 3856271 A US3856271 A US 3856271A
- Authority
- US
- United States
- Prior art keywords
- mixing tool
- mixing
- rotatable shaft
- feeding conduit
- annular chamber
- 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
Links
- 239000002023 wood Substances 0.000 title claims abstract description 23
- 238000004026 adhesive bonding Methods 0.000 title description 4
- 239000003292 glue Substances 0.000 claims abstract description 71
- 239000007788 liquid Substances 0.000 claims abstract description 50
- 239000000463 material Substances 0.000 claims abstract description 29
- 239000000203 mixture Substances 0.000 claims abstract description 20
- 239000000835 fiber Substances 0.000 claims abstract description 12
- 229920002678 cellulose Polymers 0.000 claims abstract description 10
- 239000001913 cellulose Substances 0.000 claims abstract description 10
- 239000002699 waste material Substances 0.000 claims description 10
- 241000609240 Ambelania acida Species 0.000 claims description 8
- 239000010905 bagasse Substances 0.000 claims description 8
- 238000007789 sealing Methods 0.000 claims description 2
- 239000012530 fluid Substances 0.000 description 10
- 238000001816 cooling Methods 0.000 description 9
- 230000008901 benefit Effects 0.000 description 6
- 238000009826 distribution Methods 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 230000035508 accumulation Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 239000000110 cooling liquid Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 240000005809 Prunus persica Species 0.000 description 1
- 235000006040 Prunus persica var persica Nutrition 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000012809 cooling fluid Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000010408 sweeping Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- 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
- B27N1/00—Pretreatment of moulding material
- B27N1/02—Mixing the material with binding agent
- B27N1/0227—Mixing the material with binding agent using rotating stirrers, e.g. the agent being fed through the shaft of the stirrer
- B27N1/0236—Mixing the material with binding agent using rotating stirrers, e.g. the agent being fed through the shaft of the stirrer with the stirrers rotating about an horizontal axis, e.g. in consecutive casings
Definitions
- ABSTRACT A device for applying glue to wood shavings, fibers and similar cellulose containing materials and mixtures in a mixing container, according to which a feeding conduit feeds liquid glue into an annular chamber formed by the outside of the feeding conduit and the inside of a hollow rotatable shaft surrounding the feeding conduit. The liquid glue is then passed through a longitudinal passage in a mixing tool which is connected to the hollow shaft for rotation therewith and passes outwardly to an area near the free end of the mixing tool which free end is intended to immerse into the mixture in the mixing container.
- the present invention relates to a device for gluing wood shavings, fibers and similar material mixed from wood, waste bagasse or the like, preferably cellulosecontaining substances, which device comprises primarily a substantially cylindrical mixing chamber in which the substances to be glued are circulated by mixing tools which in their turn are journalled on a central drive shaft, which latter serves for feeding the glue liquid.
- the hollow drive shaft is provided with radial outlet openings for the glue liquid which latter passes from said outlet openings into radial tubes which protrude beyond the hollow drive shaft.
- Each of said tubes when viewed in the direction of rotation of the drive shaft is located behind a mixing tool in the form of a mixing arm connected to the hollow shaft.
- FIG. 1 illustrates a section through the mixing tool according to the invention, which section is effected perpendicularly with regard to the axis of the drive shaft.
- FIG. 2 shows the section taken along the line ll II of FIG. 1.
- FIG. 3 is a section taken along the line "I III of FIG. 1.
- the device according to the present invention is characterized primarily in that in the lower range of each mixing tool there is provided at least one inlet opening for the glue fluid conveyed through the interior of the drive shaft and is furthermore characterized in that there is provided at least one feeding passage extending from the lower portion of the mixing tool to its upper portion, and there is furthermore provided at least one outlet opening for the glue liquid in the radial outer range of the mixing tool.
- the glue fluid itself serves as cooling fluid whereby in a surprisingly simple manner there has been realized not only a liquid cooling of the mixing tools without the provision of additional structural elements and without giving up the advantages of a liquid feed radially inwardly, but in view of the employment of mixing tools there has been obtained over heretofore known arrangements of the type involved a reduction in the structural element and thereby also in the cost of production of devices of the type involved.
- the outlet openings for the liquid glue are provided radially inwardly of the upper range of the mixing tool extending into the mixture whereby the circulating flow of mixture is in the heretofore known customary manner sprayed from the inside, preferably, however, only with a portion of the total quantity of glue liquid.
- Particularly advantageous are outlet openings in the upper portion of the mixing tool which immerses into the mixture, and, more specifically, in such a way that at least these outlet openings are arranged on that side of the mixing tool which when considering the direction of rotation of the mixing tool forms the rear side.
- glue is conveyed to the turbulent path which, when considering the direction of rotation of the tool, is located behind the mixing tools, whereby an immediate mixing in and an immediate wiping by shaving on shaving friction is effected within the region of the turbulent zone without permitting any formation of lumps.
- the feeding of glue from the mixing tool is aided by the under-pressure on that side of the tool which, when considering the direction of rotation of the tool, is the rearward side.
- the feeding of glue from the mixing tool can furthermore be aided advantageously by arranging the outlet openings so that when viewing in the direction of flow of the mixture, the outlet openings are inclined from radially inwardly to radially outwardly.
- the mixing tool may be formed by a thick walled tube.
- Functionally more favorable, however,- is a design of the mixing tool in such a way that in cross section the tool has a dropshaped streamline contour, the tip of which, however, is located in front when considering the direction of rotation. In this way, the shavings are split up by the mixing tools moving therethrough while no excessive resistance is encountered and therefore the development of friction and heat is held within compatible limits. Simultaneously, it will be assured that a sufficient relative velocity prevails between the rotating flow of material and the driving mixing tools. This relatively velocity is a measurement for the under-pressure behind the mixing tools and for the degree of the prevailing turbulence.
- a flow technical improvement can furthermore be realized according to the invention by designing the rearward confining surface of the mixing tool in such a flattened form that the spacing of its rearmost point when considering the direction of rotation, from the plane of the greatest tool width is less than the spacing of the front tip of the tool cross section from said plane, said rearward confining surface of the mixing tool comprising the outlet openings for the liquid glue.
- the exit openings for the glue liquid lead into the vicinity of the maximum width of the mixing tool.
- the glue liquid is introduced directly into the strong turbulences which form within the marginal region of the path of movement directly behind the mixing tool, where an immediate intermixing and intensive distribution is effected.
- the glue fluid is fed through a feeding pipe which is coaxially arranged within a hollow drive shaft.
- the glue fluid passes through openings 12 in the mantle of the feeding pipe 10 into the annular chamber 13 between the feeding pipe 10 and the outer wall of the rotating drive shaft 11.
- the glue fluid is rotated by friction on the inner wall of pipe 13 and in the form of a film deposits on the outer wall of the annular chamber 13. Due to centrifugal forces, the glue fluid is, through a further opening 14, conveyed to an inlet opening 15 in the lower region of the mixing tool 16 which forms a mixing arm. From here the glue fluid passes into a feeding passage 18 which leads into the upper portion 17 of the mixing tool 16.
- the feeding passage 18 is in the specific embodiment shown in the drawing designed as a bore extending through the entire length of the mixing tool 16. However, if desired, instead there could be provided a blind bore which is open in the inner range of the mixing tool 16. A stopper, for instance in the form of a threaded closure member 19, could be provided for closing the outer end of a bore. extending throughout the length of the tool so that if necessary or desired the cleaning of the conveying passage 18 would be greatly facilitated by temporarily removing the stopper. Advantages with regard to cleaning could also be realized by not welding the mixing tool 16 to the driving shaft 11 as shown in the drawing but detachably connecting the mixing tool 16 to the drive shaft 11 for instance by a screw connection.
- the mixing tool 16 is formed by a substantially circular segmental flow body with a tip which, when considering the direction of rotation indicated by the arrow 20, is located in front.
- a substantially circular segmental flow body with a tip which, when considering the direction of rotation indicated by the arrow 20, is located in front.
- the outlet openings 21 and 22 are, when viewed in the direction of rotation indicated by arrow 20, arranged in the rearward portion of the mixing tool 16 and lead into the rear confining wall 23 of the mixing tool 16.
- the outlet openings 21 and 22 when viewed in the direction of flow indicated by the arrow 24 are radially inwardly and radially outwardly inclined (FIG. 1).
- the outflow resistance is reduced and in cooperation with the underpressure prevailing within the region of the rearward confining wall 23 and in cooperation with the conveying pressure produced by these centrifugal forces, a continuous functionally correct outflow of the glue fluid through the outlet openings 21 and 22 is obtained.
- the rear confining wall 23 is only slightly curved or arched so that preferably its rearmost point (when viewed in the direction of rotation indicated by arrow 20) is spaced from the plane of the largest width b of the mixing tool by a distance which is less than the distance between said rearmost point and the front tip of the mixing tool 16 (see FIG. 3).
- the flow containing the mixing material and air will tear off at the edges defining the width b of the mixing tool 16 so that within the region behind the rear confining wall 23 of the mixing tool there will develop a strong underpressure and strong cavitation turbulence.
- a plurality of outlet openings for the glue fluid may be provided along the conveying passage 18. This may be effected in particular not only in the head range 17 of the mixing tool 16, which head range is immersed into the flow of the material, but may also be effected radially within the mixing tool 16 in such a way that liquid glue exiting through a plurality of narrow bores will from the inside spray the circulating flow of material in a substantially homogeneous and continuous manner.
- liquids other than glue fluid may be admixed to a circulating flow of material provided that analogous problems of an intensive intermixture with simultaneous cooling are to be solved.
- a device for mixing wood shavings, fibers and similar mixtures of wood and waste bagasse, especially cellulose containing materials and for simultaneously adding glue thereto which includes: a hollow rotatable shaft, feeding conduit means arranged within said rotatable shaft in radially spaced relationship thereto so as to define with said rotatable shaft an annular chamber, said feeding conduit means being adapted to be connected to a supply of liquid glue and being provided with passage means therethrough for conveying liquid glue from said feeding conduit means into said annular chamber, and a longitudinal mixing tool connected to and extending outwardly of said rotatable shaft for rotation in a mixing chamber, said mixing tool having an outer free end and being provided with a longitudinal passage communicating with said annular chamber and with outlet passage means including an outer mouth communicating with said longitudinal passage substantially transverse thereto and leading to the outside of said mixing tool, said outlet passage means being provided near the outer free end of said mixing tool which end is intended to be immersed into material to be mixed in a mixing chamber, the mouth of said outlet passage means being located on the trailing
- a device for mixing wood shavings, fibers and similar mixtures of wood and waste bagasse, especially cellulose containing materials and for simultaneously adding glue thereto which includes: a hollow rotatable shaft, feeding conduit means arranged within said rotatable shaft in radially spaced relationship thereto so as to define with said rotatable shaft an annular chamber, said feeding conduit means being adapted to be connected to a supply of liquid glue and being provided with passage means therethrough for conveying liquid glue from said feeding conduit means into said annular chamber, and a longitudinal mixing tool connected to and extending outwardly of said rotatable shaft for rotation in a mixing chamber, said mixing tool having an outer free end and being provided with a longitudinal passage communicating with said annular chamber and with outlet passage means including an outer mouth communicating with said longitudinal passage substantially transverse thereto and leading to the outside of said mixing too], said outlet passage means being inclined from said longitudinal passage to the outer mouth of said outlet passage means in the direction toward the free end of said mixing tool.
- a device for mixing wood shavings, fibers and similar mixtures of wood and waste bagasse, especially cellulose containing materials and for simultaneously adding glue thereto which includes: a hollow rotatable shaft, feeding conduit means arranged within said rotatable shaft in radially spaced relationship thereto so as to define with said rotatable shaft an annular chamber, said feeding conduit means being adapted to be connected to a supply of liquid glue and being provided with passage means therethrough for conveying liquid glue from said feeding conduit means into said annular chamber, and a longitudinal mixing tool connected to and extending outwardly of said rotatable shaft for rotation in a mixing chamber, said mixing tool having an outer free end and being provided with a longitudinal passage communicating with said annular chamber and with outlet passage means including an outer mouth communicating with said longitudinal passage substantially transverse thereto and leading to the outside of said mixing tool, said mixing tool having a somewhat triangular cross section including a tip of the triangle forming the leading edge when considering the direction of rotation of said mixing tool.
- a device in which said outlet passage means are provided near the outer free end of said mixing tool which end is intended to be immersed into material to be mixed in a mixing chamber.
- a device in which the mouth of said outlet passage means is located on the trailing side of said mixing tool when considering its direction of rotation.
- a device in which the mouth of said outlet passage means is located in the vicinity of the greatest width of the mixing tool.
- a device for mixing wood shavings, fibers and similar mixtures of wood and waste begasse, especially cellulose containing materials and for simultaneously adding glue thereto which includes: a hollow rotatable shaft, feeding conduit means arranged within said rotatable shaft in radially spaced relationship thereto so as to define with said rotatable shaft an annular chamber, said feeding conduit means being adapted to be connected to a supply of liquid glue and being provided with passage means therethrough for conveying liquid glue from said feeding conduit means into said annular chamber, and a longitudinal mixing tool connected to and extending outwardly of said rotatable shaft for rotation in a mixing chamber, said mixing tool having an outer free end and being provided with a longitudinal passage communicating with said annular chamber and with outlet passage means including an outer mouth communicating with said longitudinal passage substantially transverse thereto and leading to the outside of said mixing tool, the longitudinal passage in said mixing tool extending through the entire length thereof, and a closure member arranged in the outer free end of said mixing tool and thereby sealing said longitudinal passage at the outer free end of said mixing tool.
- a device in which said closure member is detachably connected to said mixing tool.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Coating Apparatus (AREA)
- Accessories For Mixers (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2164380A DE2164380C3 (de) | 1971-12-23 | 1971-12-23 | Vorrichtung zum Beleimen von Holzspänen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3856271A true US3856271A (en) | 1974-12-24 |
Family
ID=5829111
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US00318648A Expired - Lifetime US3856271A (en) | 1971-12-23 | 1972-12-26 | Mixing device for gluing wood shavings |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US3856271A (de) |
| CA (1) | CA976745A (de) |
| DE (1) | DE2164380C3 (de) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4139308A (en) * | 1976-12-22 | 1979-02-13 | Bison-Werke Bahre & Greten Gmbh & Co. Kg | Gluing machine for gluing lignocellulose-containing particles used for producing pressed wood plates |
| US4184775A (en) * | 1977-10-05 | 1980-01-22 | Nobuo Akizawa | Apparatus for washing cereals |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4002099A1 (de) * | 1990-01-25 | 1991-08-01 | Draiswerke Gmbh | Mischer |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3360245A (en) * | 1966-02-28 | 1967-12-26 | James P Peach | Apparatus for treating seed grain in a seed drill |
| US3466015A (en) * | 1967-01-11 | 1969-09-09 | Loedige Wilhelm | Process of and apparatus for wetting bulk materials |
| US3734471A (en) * | 1970-11-24 | 1973-05-22 | Draiswerke Gmbh | Device for continuous mixing of solids with liquids |
-
1971
- 1971-12-23 DE DE2164380A patent/DE2164380C3/de not_active Expired
-
1972
- 1972-12-22 CA CA159,828A patent/CA976745A/en not_active Expired
- 1972-12-26 US US00318648A patent/US3856271A/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3360245A (en) * | 1966-02-28 | 1967-12-26 | James P Peach | Apparatus for treating seed grain in a seed drill |
| US3466015A (en) * | 1967-01-11 | 1969-09-09 | Loedige Wilhelm | Process of and apparatus for wetting bulk materials |
| US3734471A (en) * | 1970-11-24 | 1973-05-22 | Draiswerke Gmbh | Device for continuous mixing of solids with liquids |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4139308A (en) * | 1976-12-22 | 1979-02-13 | Bison-Werke Bahre & Greten Gmbh & Co. Kg | Gluing machine for gluing lignocellulose-containing particles used for producing pressed wood plates |
| US4184775A (en) * | 1977-10-05 | 1980-01-22 | Nobuo Akizawa | Apparatus for washing cereals |
Also Published As
| Publication number | Publication date |
|---|---|
| DE2164380A1 (de) | 1973-07-05 |
| DE2164380C3 (de) | 1975-02-20 |
| CA976745A (en) | 1975-10-28 |
| DE2164380B2 (de) | 1974-06-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3734471A (en) | Device for continuous mixing of solids with liquids | |
| US4527902A (en) | Methods and mixers for the continuous addition of glue to mixtures consisting of wood chips, wood fibres or the like | |
| JP4559360B2 (ja) | 混合撹拌機、混合撹拌方法及び石膏ボード製造方法 | |
| US4370945A (en) | Method for gluing of particles containing chips, fibers and similar ligno-cellulose-containing particles and apparatus for this purpose of gluing the same | |
| US3163403A (en) | Mixing machine | |
| US2464771A (en) | Apparatus for coating webs | |
| US4006887A (en) | Device for continuous coating of fibers | |
| US3235002A (en) | Heat exchange apparatus | |
| US3856271A (en) | Mixing device for gluing wood shavings | |
| US4444810A (en) | Apparatus for treating granular material by drying, film-coating or coating | |
| US2467809A (en) | Apparatus for homogenizing molten glass in a forehearth | |
| US4015830A (en) | Apparatus for applying glue to chips, fibers and the like | |
| US2844914A (en) | Nozzle assembly for mulch spreaders and the like | |
| US3743187A (en) | Nozzle | |
| US4840492A (en) | Rotational screw for mixing | |
| US3845940A (en) | Mixing tool for machines for applying glue to shavings | |
| US3884294A (en) | Liquid cooled mixing tool for machines for applying glue to shavings | |
| SU1620042A3 (ru) | Способ нанесени текучего материала на внутреннюю поверхность полого тела и устройство дл его осуществлени | |
| US2364264A (en) | Means for distributing fluid in accurately measured quantities | |
| US3503591A (en) | Mixing apparatus | |
| CA1154246A (en) | Method for gluing of particles containing chips, fibers and similar ligno-cellulose-containing particles and apparatus for this purpose of gluing the same | |
| JP2001029764A (ja) | インライン型流体攪拌装置 | |
| US3466015A (en) | Process of and apparatus for wetting bulk materials | |
| US4139308A (en) | Gluing machine for gluing lignocellulose-containing particles used for producing pressed wood plates | |
| CN2180321Y (zh) | 高速混合机的液体注料机构 |