Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
  • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
  • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
  • B26D1/56—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which travels with the work otherwise than in the direction of the cut, i.e. flying cutter
• • C—CHEMISTRY; METALLURGY
  • C03—GLASS; MINERAL OR SLAG WOOL
  • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
  • C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
  • C03B37/10—Non-chemical treatment
  • C03B37/16—Cutting or severing
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
  • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
  • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
  • B26D1/0006—Cutting members therefor
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
  • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
  • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
  • B26D1/01—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work
  • B26D1/04—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a linearly-movable cutting member
  • B26D1/06—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a linearly-movable cutting member wherein the cutting member reciprocates
  • B26D1/10—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a linearly-movable cutting member wherein the cutting member reciprocates in, or substantially in, a direction parallel to the cutting edge
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
  • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
  • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
  • B26D1/56—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which travels with the work otherwise than in the direction of the cut, i.e. flying cutter
  • B26D1/60—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which travels with the work otherwise than in the direction of the cut, i.e. flying cutter and is mounted on a movable carriage
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
  • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
  • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
  • B26D1/0006—Cutting members therefor
  • B26D2001/006—Cutting members therefor the cutting blade having a special shape, e.g. a special outline, serrations

Definitions

• the present invention relates to an apparatus for cutting a mineral wool web, comprising an un- rotatable cutter extending transversely over the min ⁇ eral wool web and arranged to move through the min ⁇ eral wool web against its plane.
• size cutting is carried out directly on the production line, usually by means of circular saws provided with a cutting edge of hard metal which cuts about 4 mm off the product and which forms dust which has to be sucked off.
• a line having a width of 2 m and producing sheets of 0.5 x 1.0 mm 1.5% of the produc- tion will be cut off with a dust formation of about 50 kg/h.
• Transverse cutting covers 30 to 60% of this amount, depending on whether the size cutting is carried out transversely of the line over the length of 1.0 mm or 0.5 mm.
• Dustless length cutting can be achieved, e.g., by band knives (band saws with knife-sharpened cutting edges) or by slowly rotating knife-sharpened cutting edges of hard metal such as disclosed in Finnish Patent 56636 or by a circular knife-sharpened cutter of the type used within textile industries.
• Transverse cutting has been carried out with a similar slowly rotating circular knife, but the equipment is expensive with an advanced computer con ⁇ trol for DC motors accelerating, retarding and re- versing the blade for rotation and movement in de ⁇ sired direction.
• Such rotating cutters have to be thin to be able to cut through the wool web without difficulty, which easily causes them to chop.
• For dustless transverse cutting are also used rapidly striking guillotines with toothed cutting edges striking vertically through the wool web.
• the guillotine cutter effects a strike in about 0.1 s, during which time it is subjected to a strain by the continuously fed wool web. For this reason, the cutter has to be at least 5 mm thick. Due to the above-mentioned drawback, such a guillotine cannot cut products having a density greater than about 80 kg/m . Because of the strain exerted on the guil- lotine cutter, the cut is uneven and the wool web is often broken at the cut.
• the object of the present invention is to pro ⁇ vide a new apparatus based on the prior art guillot ⁇ ine cutting of mineral wool, by means of which ap.- paratus a mineral wool web can be cut without the formation of dust and avoiding the drawbacks of prior art guillotines.
• the apparatus according to the invention is mainly charac- terized in that the cutter is in the form of a thin cutter blade which does not form cuttings; that the cutter blade is stretched within a frame to ensure that its cutting edge remains straight during the cutting process; that the frame with the stretched cutter blade is arranged to simultaneously move in the vertical direction toward the mineral wool web and in the horizontal direction transversely over it to effect an oblique cutting movement; and that the frame with the stretched cutter blade is mounted on a carriage arranged to move in synchronization with the mineral wool web during the cutting of said mineral wool web.
• the horizontal movement of the oblique transverse cutting is arranged to be equal to or greater than the vertical movement to ensure that a cut of high quality is achieved.
• An angle of about 30° relative to the horizontal plane could probably be regarded as optimal for achieving a high-quality cut with little force and rapid cutting movement.
• Alternative solutions for obtaining such a cutting movement are presented in greater detail in claims 7 and 8.
• the cutting force is substantially smaller than with thicker cutters used in prior art guillotines and ro ⁇ tating cutter blades.
• the frame within which the cutter blade is stretched can be formed by a light tube construction, such as a triangular boom, whereby the mass to be moved is small, and the to-and-fro movement can be made rapid without difficulty.
• the apparatus including required support and guide constructions, is light, so that remarkable savings are attained partly in production costs and partly because of easier maintenance.
• the movement of the carriage can be synchronized with that of the mineral wool web by means of, for instance, pull ropes oper ⁇ ated by a servomotor or by a nut-screw drive.
• pull ropes oper ⁇ ated by a servomotor or by a nut-screw drive.
• Figures 1 to 3 show a first embodiment of the apparatus in a sectional view against the direction of movement of the mineral wool web, from the top, and in the direction A of Figure 2, respectively.
• Figures 4 to 6 show similarly a second embodi ⁇ ment of the apparatus.
• Figure 7 is an enlarged view of a portion of the cutter blade.
• the mineral wool web to be cut is to be seen in Figures 1 and 4, and is designated with the reference numeral 1.
• Figures 1 and 4 the direction of move ⁇ ment of the mineral wool web is toward the one who views the drawing.
• Figures 2 and 5 the direction of movement of the mineral wool web is from above downward, in Figure 3 from the left to the right, and in Figure 6 from the right to the left; the mineral wool web is not visible in these figures.
• the cutting apparatus is designated generally with the reference numeral 2 in Figures 1 to 6, in which it is in a position of readiness for cutting the mineral wool web 1.
• the cutting apparatus 2 comprises a carriage 3 on which the proper cutting means, that is, the active cutting means, are mounted.
• the carriage 3 is mounted on a base 4 provided with rails or tracks 5 which extend in the direction of the mineral wool web 1 and along which the carriage 3 is movable on wheels, ball bushes or the like.
• the active cutting means comprise a thin cutter blade 6 the cutting edge of which can be either a continuous knife edge or, as shown in Figure 7, knife toothed so that the outstanding corners 8 of the in- dividual knife teeth or edges 7 project backward in relation to the movement component of the cutter blade 6 in the transverse direction of the mineral wool web 1.
• the individual knife edges 7 shown in Figure 7 are preferably formed by knife-sharpened cutting edges made of hard metal and secured to the cutter blade 6. With such hard metal cutting edges, the thickness of the cutter blade will usually be about 2.5 to 3 mm. If no such hard metal cutting edges are used, the cutter blade 6 can be made con- siderably thinner, even as thin as 0.5 mm, in which case the cutting edge, however, has to be resharpened more frequently.
• the cutter blade 6 is stretched within a frame 9 to ensure- that its cutting edge remains straight during the cutting process.
• a brush roller 10 against the cutter blade 6 under the mineral wool web 1 to act as a dolly, so that the cutter blade can penetrate about 10 mm into the brush of the roller.
• the roller does not need any driving means as it is driven by the mineral wool web so that two successive cuts will not be made at the same point on the brush.
• the frame 9 with the stretched cutter blade 6 is mounted on the carriage 3 through wheels 11 which run along obliquely positioned rails 12, or, for instance, by means of corresponding ball bushes, and the cutting movement is arranged to be effected by means of a motor 13, such as a geared motor, attached to the frame 9 by a connecting rod 14.
• a motor 13 such as a geared motor
• the connecting rod 14 draws the frame 9 along the rails 12 obliquely downward, and the cutter blade 6 cuts the mineral wool web 1.
• a special advantage of this particular embodiment is that in this way the cutting force increases substantially during the cutting movement, which makes the embodiment par ⁇ ticularly suited for cutting high-density mineral wool webs.
• the connecting rod performs a to-and-fro movement for each cut, so that the secondary shaft of the gearing, to which the driving arm of the connect ⁇ ing rod is connected, performs one revolution for each cut.
• the embodiment also has the advantage that it provides a smooth start and stop period of about 50 to 100 milliseconds with a cutting time of about 1 second, whereby the projecting shaft of the gearing performs 60 revolutions per one minute.
• the cutting movement is carried out by means of four preferably pneumatic shuttle cylinders 15.
• the shuttle cylinders 15 as well as the guides 11 and 12 shown in Figures 1 and 2 are preferably disposed in pairs on both sides of the frame 9 at the fasten- ing ends of the cutter blade.
• Both the shuttle cyl ⁇ inders 15 and the guides 11 and 12 are preferably mounted on obliquely positioned supports 18 firmly connected to the carriage 3.
• the frame 9 is fastened to the shuttle cylinders 15 and the wheels 11, re- spectively, positioned on its both sides by means of transverse supports 19.
• the carriage 3 is arranged to move on along the rails 5 at a speed synchronized with the speed of the mineral wool web during the cutting process.
• the re- turn movement of the cutter blade 6 included, the cutting process takes about one second, whereafter the carriage 3 returns to its initial position shown in the drawing, which on an average takes another second.
• the apparatus is now ready to make a new cut. In this way a cutting frequency of about 30 cuts per minute is achieved.
• the car- riage 3 is operated by a servo motor 20 which drives two toothed bands 22 through an interconnecting shaft 21.
• the geared motor 13, which is mounted on the car ⁇ riage 3 can be a standard three-phase synchronous braking motor with a constant rate of rotation, while the servo motor 20 is operated by a synchronizing unit which ensures that the carriage 3 moves exactly at the same speed as the production line during the cutting process.
• the toothed bands 22 can be replaced with nut screws 23 operated by two servo motors 24 syn ⁇ chronized with each other.

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• Engineering & Computer Science (AREA)
• Life Sciences & Earth Sciences (AREA)
• Forests & Forestry (AREA)
• Mechanical Engineering (AREA)
• Chemical & Material Sciences (AREA)
• Manufacturing & Machinery (AREA)
• Geochemistry & Mineralogy (AREA)
• General Life Sciences & Earth Sciences (AREA)
• Materials Engineering (AREA)
• Organic Chemistry (AREA)
• Treatment Of Fiber Materials (AREA)
• Nonmetal Cutting Devices (AREA)
• Preliminary Treatment Of Fibers (AREA)

Applications Claiming Priority (2)

Publications (1)

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ID=8527397

Family Applications (1)

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• 1988
  • 1988-11-16 FI FI885309A patent/FI80622C/sv not_active IP Right Cessation
• 1989
  • 1989-11-16 KR KR1019900701482A patent/KR900701487A/ko not_active Application Discontinuation
  • 1989-11-16 EP EP89912452A patent/EP0444066A1/en not_active Withdrawn
  • 1989-11-16 CH CH2370/90A patent/CH677081A5/de not_active IP Right Cessation
  • 1989-11-16 AU AU45102/89A patent/AU4510289A/en not_active Abandoned
  • 1989-11-16 WO PCT/FI1989/000211 patent/WO1990005620A1/en not_active Application Discontinuation
• 1991
  • 1991-05-02 DK DK081991A patent/DK81991A/da unknown

Non-Patent Citations (1)

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