JP5499285B2 - Sheet material cutting device - Google Patents

Description

  The present invention relates to a sheet material cutting apparatus for cutting a sheet material. More specifically, the present invention relates to a sheet material cutting apparatus for cutting a laminated sheet material with a cutting blade.

  Conventionally, the laminated sheet material is sucked and held on a cutting table on which a bristle bed is laid, and the cutting head provided in the cutting head is set in advance by reciprocating up and down while moving the cutting head in the horizontal direction. A sheet material cutting device for cutting the sheet material into a formed shape is known.

  The cutting blade is mounted downward from the cutting head. The cutting blade penetrates the sheet material while reciprocating the cutting blade up and down, and cuts the sheet material while turning the cutting edge toward the cutting direction. It has come to do. Therefore, the cutting edge of the cutting blade and both side surfaces of the cutting blade reciprocate up and down while in contact with the sheet material, thereby generating frictional heat. If the amount of frictional heat generated is large, the temperature of the cutting blade and the sheet material around the cutting blade rises, especially when synthetic fibers such as nylon and polyester, or a glued interlining is used. Sheet material is welded, and the laminated sheet materials cannot be separated individually, and further, the cutting blade itself is attached to the cutting blade and the adhesive paste of the paste material, and the cutting blade is not sharp. .

  For this reason, the cutting speed is extremely reduced to reduce the generation amount of frictional heat, but there is a problem that the cutting efficiency is lowered.

  Therefore, a groove is formed in the peak (rear) portion of the cutting blade, air is introduced into the groove by the air flow at the time of cutting, and the cutting blade is cooled from the inside to prevent the occurrence of welding. (For example, Patent Document 1).

  Also disclosed is a cutting blade for forming a hollow portion in the cutting blade, providing a hole communicating with the hollow portion on a side surface thereof, supplying cool air to the hollow portion, and ejecting the hollow portion to cool the cutting portion. (For example, Patent Document 2).

JP 2008-44030 A JP 2000-42992 A

  By the way, although the cutting blade of patent document 1 has a groove | channel formed in the part of a peak (back surface), since there is no forced air introduction, in order to raise cooling efficiency, you have to provide a big groove | channel. As a result, the rigidity is lowered, and the cutting blade itself may be warped or damaged due to the cutting resistance. When the cutting blade warps as described above, there is a problem that the sheet material cannot be cut into a predetermined shape.

  Moreover, the cutting blade of Patent Document 1 is not the cutting edge, but the ridge on the opposite side of the cutting edge is cooled, but in fact, it is the cutting edge that receives the greatest frictional heat during cutting. In the cutting blade of Patent Document 1, the cutting edge of the cutting blade cannot be sufficiently cooled, and there is a problem that welding scraps adhere to the cutting edge or the welding of the sheet material cannot be completely prevented.

  In addition, since the cutting blade of Patent Document 1 has a groove formed on the peak (back surface) as described above, it does not contribute to the reduction of the contact area in contact with the sheet material. Since the frictional heat due to the contact with the cutting blade is directly received, there is a problem that the welding of the sheet material and the adhesion of the welding waste to the cutting blade cannot be completely prevented.

  Moreover, since the cutting blade of patent document 2 is formed in hollow, there exists a problem which the rigidity of a cutting blade cannot be maintained but breaks, and the process of a cutting blade becomes complicated. Furthermore, a compressor or the like has to be newly provided as an air supply source for cooling the cutting blade, resulting in a high cost.

  SUMMARY OF THE INVENTION The present invention provides a sheet material cutting apparatus that prevents sheet material welding and adhesion of welding scraps to the cutting blade while maintaining the rigidity of the cutting blade, and enables accurate cutting.

Accordingly, the invention of claim 1 is a cutting table for sucking and holding a sheet material on its upper surface, a cutting head provided horizontally on the cutting table, and a sheet provided on the cutting head by reciprocating up and down. A sheet material comprising: a cutting blade that cuts the material; and a lifting cylinder that is provided on the cutting head and moves up and down between a rising position where the cutting blade is separated from the sheet material and a cutting position where the sheet material is cut . A cutting device , a ventilation pipe provided in the vicinity of the cutting edge of the cutting blade , and two grooves provided on both sides of the cutting blade along the longitudinal direction of the flat portion of the cutting blade ; , and an electromagnetic valve for supplying to said vent pipe branches the part of the air supplied to the descending air introducing portion of the elevating cylinder, ejecting child air towards the said vent pipe cutting edge of said cutting blade By a cutting apparatus employing sheet material a structure which is adapted to cool the cutting surfaces of the sheet material through the grooves to cool the cutting blade.

  In addition, by branching the descending air to the cylinder that raises and lowers the cutting blade of the cutting head to the cutting position and connecting it to the air jetting section, an air jetting is performed at the time of cutting without providing a separate air jetting compressor or the like. Air can be ejected from the section.

  As described above, grooves are formed on both side surfaces of the cutting blade along the longitudinal direction of the cutting blade, and an air ejection portion for ejecting air toward the cutting edge of the cutting blade is provided, and air is ejected from the air ejection portion. As a result, the cutting blade is cooled and the cut surface of the sheet material is cooled through the groove, so that the cutting edge that generates the most frictional heat can be efficiently cooled and the rigidity of the cutting blade can be reduced. Since the portion in contact with the sheet material can be cooled by the groove provided in a state in which the sheet material is maintained, there is no welding of the cut surface of the sheet material, and there is no adhesion of welding scraps to the cutting blade.

  Since there is no welding of the cut surface of the sheet material, cutting can be performed without drastically reducing the cutting speed, and production efficiency is not lowered. Further, separation of the sheet material is facilitated.

  In addition, since welding scraps do not adhere to the cutting blade, the replacement frequency of the cutting blade is reduced and the production efficiency is improved. In addition, since grooves are formed along the longitudinal direction of the cutting blade on both side surfaces of the cutting blade, the contact area with the sheet material can be reduced while maintaining the rigidity of the cutting blade, and further, the air is blown from the air blowing portion. Since air can be ventilated into the sheet material along the groove, it is possible to prevent cutting with high accuracy and welding of the sheet material.

It is a perspective view of the sheet material cutting device of the present invention. It is a front view of the cutting head part of the sheet material cutting device of the present invention. It is the AA direction arrow top view which notched a part of FIG. It is a BB direction arrow sectional view of FIG. (A) The front view of the cutting blade used for the sheet material cutting apparatus of this invention. (B) CC direction arrow sectional drawing of the cutting blade used for the sheet material cutting apparatus of this invention. It is explanatory drawing of the sheet material cutting apparatus of this invention.

  One embodiment of the sheet material cutting device of the present invention will be described below with reference to FIGS.

  FIG. 1 is a perspective view showing the entire sheet material cutting apparatus according to the present invention, in which a cutting table 5 on which bristles 23 for sucking and holding the sheet material 2 are laid is provided horizontally, and the cutting table 5 is cut on the cutting table 5. A Y beam 2 that is movable along the table 5 is stretched.

  A rail 22 is laid on the Y beam 2, and a cutting head 4 movable in the Y direction along the rail 22 is provided on the rail 22, and a cutting blade provided on the cutting head 4. 6 reciprocates up and down while passing through the sheet material 3 sucked and held on the cutting table 5, and the sheet material 3 is cut into a predesigned shape by a control means (not shown). In order to increase the suction force of the cutting part, the sheet material 3 is appropriately covered with a vinyl sheet 25.

  Next, the cutting head 4 and the cutting blade 6 to be mounted will be described with reference to FIGS.

  As shown in FIG. 2, the cutting head 4 is supported by a head support plate 30 provided horizontally on the Y beam 2, and a slider 31 attached to the lower surface of the head support plate 30 slides on the rail 22. The cutting head 4 is moved on the Y beam 2 by an appropriate driving means (not shown) by being fitted.

  A head fixing plate 29 is erected perpendicularly to the head support plate 30, and an elevating cylinder 28 is erected and fixed in parallel to the head fixing plate 29 at the lower end of the head fixing plate 29.

  Further, an elevating frame 27 provided with a drive mechanism 26 for holding the cutting blade 6 downward and reciprocating the cutting blade 6 is connected to the shaft of the elevating cylinder 28. Is driven, the cutting blade 6 is lowered from the position indicated by the two-dot chain line to the position for cutting the solid sheet material 3 along a rail (not shown).

  Further, two support bars 13 are fixed along the cutting blade 6 vertically below the elevating frame 27, and a sheet presser 11 for pressing and supporting the sheet material 3 with an appropriate pressure is fixed to the tip thereof. Yes. The sheet presser 11 is composed of a sheet presser frame 24 that is circular and has a space inside as shown in FIGS. 3 and 4, a guide block 14 that is fixed inside and guides the cutting blade 6, and a lid 12. Is provided with a hole through which the cutting blade 6 is inserted. On the lid 12, a guide 21 that supports the peak (back surface) of the cutting blade 6 is provided.

  The cutting position of the sheet material 3 is normally set to a position where the sheet presser 11 is lowered until the sheet presser 11 presses the sheet material 3, but is slightly (about 1 to 6 mm) from the surface of the sheet material 3 for preventing welding. ) Is preferable. Thus, by slightly lifting the sheet presser 11 from the surface of the sheet material 3, the sheet material 3 is prevented from being compressed by the pressing of the sheet material 3, and air easily flows into the gaps between the stacked sheet materials 3. , Cooling efficiency is increased. Further, air easily flows into the gap between the sheet presser 11 and the sheet material 3 and the cooling efficiency is increased. However, since the sheet presser 11 has a role of supporting the cutting blade 6 and a function of suppressing the sheet material 3 from moving up and down by the reciprocating movement of the cutting blade 6, there is a problem that the cutting accuracy is lowered when the sheet presser 11 is floated too much. .

  The guide block 14 is provided with an opening 15 having a cross shape when viewed from above, and the opening 15 supports guides 8 and 8 when the cutting blade 6 reciprocates. Rollers 16 and 16 are provided so as to sandwich the cutting blade 6. Similarly, on the ridge (back) side of the cutting blade 6 in the opening portion 15, a guide roller 17 having a convex projecting center is provided to support the ridge (back) of the cutting blade 6. As shown in FIG. 4, a pair of guide rollers 16 are also provided on both sides in the same manner.

  In addition, the front side of the guide block 14 (the cutting edge 7 side of the cutting blade 6) is opened in a slit shape, and this opening has a ventilation pipe 19 (air blowing portion inserted from the lid 12 and simply vented thereafter). (Referred to as a pipe) is provided downward along the cutting edge 7. The ventilation pipe 19 is fixed to the lid 12 with an appropriate fixing member 20, and the rear end is connected to the ventilation hose 18.

  As shown in FIG. 6, the air supplied from the air supply source 32 is guided to the descending air introduction portion 34 of the elevating cylinder 28 via the electromagnetic valve 33, and between the solenoid valve 33 and the descending air introduction portion 34. A part of the air supplied from the air supply source 32 is ejected from the ventilation pipe 19 by connecting the branched ventilation hose 18 to the ventilation pipe 19.

  That is, the elevating cylinder 28 is actuated to lower the elevating frame 27, and when the cutting blade 6 is lowered to the cutting position of the sheet material 3, a part of the descending air acting on the elevating cylinder 28 is branched to cut the cutting blade 6. The blade edge 7 is cooled. Therefore, it is not necessary to separately provide the air supply source 32 for cooling the cutting blade 6.

  Further, when the elevating frame 27 is raised by the elevating cylinder 28, the electromagnetic valve 33 is switched and air is introduced into the ascending air introducing portion 35. At this time, since the cutting operation is not performed, the ventilation pipe 19 is not operated. Air is not ventilated.

  Next, the detail of the cutting blade 6 used by this invention is demonstrated based on Fig.5 (a) and (b).

  The cutting blade 6 is provided with a cutting edge 7 for cutting the sheet material 3 along the longitudinal direction of the cutting blade 6, and along the longitudinal direction of the cutting blade 6 at the rear part of the cutting edge 7 on both side surfaces 8, 8. Grooves 9 and 9 are provided. By providing the grooves 9 and 9 in this way, the contact area between the side surfaces 8 and 8 of the cutting blade 6 and the sheet material 3 at the time of cutting is reduced, and the air blown from the ventilation pipe 19 causes the blade edge 7 to flow. Cooling. In addition, the air ejected from the ventilation pipe 19 flows into the grooves 9 and 9 through the opening 15 of the guide block 14, and cools the portion in contact with the sheet material 3. Further, since the cutting table 5 is sucked from below, the cooling air flows from the upper surface to the lower surface of the sheet material 3.

  Therefore, the cutting edge 6 of the cutting blade 6 that generates a large amount of frictional heat is sequentially cooled from the side surfaces 8 and 8 and the rear portion of the cutting blade 6 that generate less frictional heat than the cutting edge 7. The cutting part is efficiently cooled, and the sheet material 3 is not welded and the adhering scrap is not attached to the cutting blade 6.

  For example, as an example, 15 sheets are laminated on the sheet material 3 using an interlining with a paste (nylon material), and the cutting blade 6 is reciprocated at about 4500 rotations per minute (the corner portion is about 1000 rotations per minute). When cutting at a speed condition of 15 m / min, the temperature in the vicinity of the blade edge 7 rose to about 90 ° C. before application of the present invention, whereas when cutting with air venting from the ventilation pipe 19, Although the temperature in the vicinity of the cutting edge 7 of the cutting blade 6 could be lowered to about 50 ° C., the welding of the interlining could not be completely prevented. Further, if grooves 9 and 9 having a width of about 1 mm and a depth of about 0.3 mm are provided on both side surfaces 8 and 8 of the cutting blade 6, the temperature of the cutting blade 6 during cutting can be lowered to about 35 ° C. It was possible to completely prevent the adhesion of chips and the adhesion of chips to the blade edge 7.

  The above is the embodiment of the present invention, but is not limited to the above. For example, in the present embodiment, the ventilation pipe 19 as an air ejection portion is provided along the blade edge 7, but it may be directly ejected from the front toward the blade edge 7. Further, if the groove 9 of the cutting blade 6 is provided wide and / or deep within the range in which the rigidity of the cutting blade 6 can be maintained, the contact area between the cutting blade 6 and the sheet material 3 can be further reduced and cooling can be performed efficiently.

  Further, although the sheet presser 11 is slightly lifted from the sheet material 3 in the present embodiment, it may be set as appropriate according to the material and cutting thickness of the sheet material 3. The pressure can be applied, or the pressure can be set so as to contact the sheet material 3, and the height of the sheet presser 11 can be changed at a specific location.

DESCRIPTION OF SYMBOLS 1 Sheet material cutting device 2 Y beam 3 Sheet material 4 Cutting head 5 Cutting table 6 Cutting blade 7 Cutting edge 8 Side 9 Groove 10 Fixing hole 11 Sheet presser 12 Cover 13 Support rod 14 Guide block 15 Opening part 16 Guide roller 17 Guide roller 18 Ventilation hose 19 Ventilation pipe (air ejection part)
20 fixing member 21 guide 22 rail 23 bristles 24 sheet pressing frame 25 vinyl sheet 26 drive mechanism 27 lifting frame 28 lifting cylinder 29 head fixing plate 30 head support plate 31 slider 32 air supply source 33 solenoid valve 34 descending air introduction part 35 Introduction

Claims (1)

A cutting table for sucking and holding the sheet material on the upper surface thereof, a cutting head mounted for horizontal motion on the cutting table, a cutting blade for cutting the sheet material by the vertical reciprocating movement is provided to the cutting head, wherein the cutting blade provided to the cutting head a cutting device of the sheet material that includes a lift cylinder for lifting between a cutting position for cutting the sheet material and spaced apart raised position from the sheet material,
A ventilation pipe provided near the cutting edge of the cutting blade;
Two grooves provided on both sides of the cutting blade along the longitudinal direction of the flat portion of the cutting blade ;
A solenoid valve for branching a part of the air supplied to the descending air introduction part of the elevating cylinder and supplying it to the ventilation pipe;
An apparatus for cutting a sheet material, wherein the cutting blade is cooled and the cut surface of the sheet material is cooled through the groove by blowing air from the ventilation pipe toward the cutting edge of the cutting blade.

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