CA1203746A - Shear wheel for cutting fabrics - Google Patents
Shear wheel for cutting fabricsInfo
- Publication number
- CA1203746A CA1203746A CA000420197A CA420197A CA1203746A CA 1203746 A CA1203746 A CA 1203746A CA 000420197 A CA000420197 A CA 000420197A CA 420197 A CA420197 A CA 420197A CA 1203746 A CA1203746 A CA 1203746A
- Authority
- CA
- Canada
- Prior art keywords
- land
- segments
- wheel
- peripheral
- shear
- 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
Links
Landscapes
- Treatment Of Fiber Materials (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
Pieces of fabric e.g. tire cord fabric are cut using a rotary shear wheel having a grooved periphery. A
land extends about the periphery of the shear wheel adja-cent the groove. The land may be larger in diameter than the cutting edge.
Pieces of fabric e.g. tire cord fabric are cut using a rotary shear wheel having a grooved periphery. A
land extends about the periphery of the shear wheel adja-cent the groove. The land may be larger in diameter than the cutting edge.
Description
37~6 A SHEAR W~EEL FOR CUTTING FABRIC
BACKGROUND OF THE INVENTION
This invention relates to a shear wheel for cutting fabrics e.g. tire cord fabric.
Discussion of the Prior Art:
In general, prior art rotary shear wheels have either 90 angle cutting edges or relief angle cutting edges (less than 90~). One of the problems associated with the 90 angle cutting edges is that the wear is faster than a relief angle cutting edges. Another problem is that the 90 angle cutting edges may mar the fabric materlal during cutting by the opposite unused cutting edge of the wheel. The problem with the relief angle cutting edges is that only one side of the wheel is used.
A problem associated with both types of angle cutting edges is that debris builds up especially when cutting tlre fabric because the fabric is covered with uncured rubber.
In view of the above, it would be advantageous to have a rotary shear wheel that does not have problems discussed above.
SUMMARY OF THE INVENTION
A solution to the above problems may be obtained with this inventon. This invention relates to a rotary shear wheel having a grooved or hollowed peripheral cut-ting surface adjacent a peripheral land. The grooved orhollowed cutting edge improves the cutting life by lntro-~L
~2 L)37~
ducing a sharper cutting angle to the material and also,the land surface adjacent to the groove keeps the fabric away from the opposite cutting edge. The land also holds the fabric horizontal while the hollow surface forming one of the cutting edges shears or cuts the material thus preventing debris from forming around the cutting edge.
This is especially true when cutting rubber like materials such as tire cord. The land, usually larger in diameter than the cutting edge, prevents marring of the material by the opposite unused edge. Hollow grooves allow the blade to be reversed for additional cutting surfaces on each side of the land. Further, resharpening the sides of the wheel by removing stock from the side of the wheel and resharpeniny the grooves reduced the land. However, the 5 wheel can still be used for cutting fabric.
DESCRIPTION OF THE DRAWINGS
Figure l is an elevated front view of a shear cutting wheel of the invention;
Eigure 2 is a side view of the wheel in Figure 1;
Eigure 3 is an elevated front view of another shear wheel of the invention;
Figure 4 is a side view of the wheel in Figure 3;
Figure 5 is an elevated front view of another shear wheel of the invention;
Figure 6 is a side view of the wheel in Eigure 5.
DESCRIPTION OF THE INVENTION
Shown in Figures 1 and 2 is a rotary shear or cutting wheel 1. The wheel or disc 1 has an axial center bore ~ for mounting -the wheel l on a shaft of a rotary shear bias cutter of the type used in the art. The ele-vated ~ront view as shown in Figure 1 illustrates the wheel 1 with a plurali-ty of projecting arcuate or scallop-ed rim segments about the periphery. As shown in Figure
BACKGROUND OF THE INVENTION
This invention relates to a shear wheel for cutting fabrics e.g. tire cord fabric.
Discussion of the Prior Art:
In general, prior art rotary shear wheels have either 90 angle cutting edges or relief angle cutting edges (less than 90~). One of the problems associated with the 90 angle cutting edges is that the wear is faster than a relief angle cutting edges. Another problem is that the 90 angle cutting edges may mar the fabric materlal during cutting by the opposite unused cutting edge of the wheel. The problem with the relief angle cutting edges is that only one side of the wheel is used.
A problem associated with both types of angle cutting edges is that debris builds up especially when cutting tlre fabric because the fabric is covered with uncured rubber.
In view of the above, it would be advantageous to have a rotary shear wheel that does not have problems discussed above.
SUMMARY OF THE INVENTION
A solution to the above problems may be obtained with this inventon. This invention relates to a rotary shear wheel having a grooved or hollowed peripheral cut-ting surface adjacent a peripheral land. The grooved orhollowed cutting edge improves the cutting life by lntro-~L
~2 L)37~
ducing a sharper cutting angle to the material and also,the land surface adjacent to the groove keeps the fabric away from the opposite cutting edge. The land also holds the fabric horizontal while the hollow surface forming one of the cutting edges shears or cuts the material thus preventing debris from forming around the cutting edge.
This is especially true when cutting rubber like materials such as tire cord. The land, usually larger in diameter than the cutting edge, prevents marring of the material by the opposite unused edge. Hollow grooves allow the blade to be reversed for additional cutting surfaces on each side of the land. Further, resharpening the sides of the wheel by removing stock from the side of the wheel and resharpeniny the grooves reduced the land. However, the 5 wheel can still be used for cutting fabric.
DESCRIPTION OF THE DRAWINGS
Figure l is an elevated front view of a shear cutting wheel of the invention;
Eigure 2 is a side view of the wheel in Figure 1;
Eigure 3 is an elevated front view of another shear wheel of the invention;
Figure 4 is a side view of the wheel in Figure 3;
Figure 5 is an elevated front view of another shear wheel of the invention;
Figure 6 is a side view of the wheel in Eigure 5.
DESCRIPTION OF THE INVENTION
Shown in Figures 1 and 2 is a rotary shear or cutting wheel 1. The wheel or disc 1 has an axial center bore ~ for mounting -the wheel l on a shaft of a rotary shear bias cutter of the type used in the art. The ele-vated ~ront view as shown in Figure 1 illustrates the wheel 1 with a plurali-ty of projecting arcuate or scallop-ed rim segments about the periphery. As shown in Figure
2, the wheel l has peripheral grooves 4 and 5 about per--
3~2V3~
ipheral land 6. The grooves 4 and 5 preferably are con-tinuous and form the peripheral cutting edges 3 at the intersection of the side 7 and 8 with adjacent grooves 4 and 5 respectively.
Shown in Figures 3 and 4 is a rotary shear or cutting wheel 11. The wheel ll has a center bore 12 for mounting the wheel 11 on a shaft of a rotary shear bias cutter of the type used in the art. The elevated front view as shown in Figure 3 illustrates the wheel 11 with a plurality of projecting segments and cutting edges 13 about the periphery. As shown in E'igure 4 the wheel 11 has peripheral grooves 14 and 15 about land 16. The grooves l~ and 15 preferably are continuous and form the cutting edges 13 at the intersection of the side 17 and 18 with adjacent grooves 14 and 15 respectively.
Shown in Figures 5 and 6 is a rotary shear or cutting wheel 21. The wheel 21 has a center bore 22 for mo~mting the wheel 21 on a shaft of a rotary shear bias cutter of the type used in the art. The elevated front view as shown in Figure 5 illustrates the wheel 21 with a plurality of projecting lobes or saw tooth cutting edges 23 about the periphery. As shown in Figure 6 the wheel 21 has peripheral grooves 24 and 25 about peripheral land 26.
The ~rooves 24 and 25 preferably are continuous and form the cutting edges 23 at the intersection of the side 27 and second side 28 with adjacent grooves 24 and 25 respectively.
The wheels 1, 11 and 21 can be used on right handed or left handed machines. The wheel can be used to cut fabric using the cutting edges at one side of the wheel and then reversed. For example, and referring to Figures 5 and 6, a bed knife 30 is mounted adjacent the wheel side 7. The fabric 32 is cut as the cutting ed~es rotate past the bed knife. After a time period, the wheel can be reversed. In other words side 8 of the wheel is adjacent the bed}~nife.
~37~6 Thè grooves 4, 5, 14, 15, 24 and 25 need not be continuous but are on the portion of the periphery used for cutting. For example and with reference to Figure 5 material e.g. tire cord 32 (shown only in Figure 5) is moved from right to left and the wheel rotates in a clock-wise direction. Moving in this direction the surface 34 - of the cutting edge does the severing. After a time period the bed knife 30 is adjusted for the wheel rotating in a counterclockwise direction and the cloth moving from left to right, or the wheel is mounted on a machine having the material moving from left to right viewed in Figure 5 to sever the fabric 32 using cutting edges 36.
The wheels of the invention can be used with only one groove along side a land. However, usin~ two grooves and a land therebetween permits reversing of the wheel, as discussed above, without debris collecting on the rim cutting edge, e.g. the cutting edge formed at the intersection of the side of the wheel and adjacent groove.
However, one groove and a land allow also for wheel rever-sal in which cutting with one side takes advantage of thegroove and cutting with the opposite side is similar to the prior art 90 or relie~ angle cutting edge. The land prevents marking of the surface of the tire cord as i-t is being cut because the land adjacent the cutting edge is preferably higher or has a larger diameter, thereby moving the fabric away from the opposite cutting edge.
The wheel can be made in a~y manner. For example and referring to Figures 5 and 6, a 16 lobe type solid carbide wheel having a 21~" bore and 6'' Dia. and ~2'1 thick.
On the peripheral surface grooves 24 and 25 of a radius of 1" and a 3/16" land 26 therebetween are formed~ The grooves can be any dimension or shape e.g. a depression formed by a radius or V-shape or flats adjacent and spaced below the land. The larger the radius the smaller the 3~ land for a given wheel thickness. The land surface pro-duced is slightly greater in diameter than the cutting edge. This assures the material will not be marred on the ~37~
unused edges. The principle of the invention can be used on straight edge shear cutters, e.g. a straight member pivoted at one end or also for a guillotine type. The groove and land combination or groove-land-groove combina-tion may be used. Further, the land can be coated with arelease coating.
The groove may extend from one cutting edge to the other. For example Figures 3 and 4 would have one groove replacing grooves 14 and 15 and land 16. In this case the debris would not collect on the cutting edge but may mar the material from the unused cutting edge. The grooves of the invention prevent debris pickup because during cutting the material is supported at the cutting edge and other adjacent surface of which can be the land or other edge or surface which provides a space between the fabric and the bottom of the groove. For the groove-land-groove rim there is a space between the fabric and bo~tom of the groove and after the cut, the material is further spaced from the cutting edge by the higher land.
The wheels are usually rotated at a speed greater than the speed of the fabric when both are compared to llnear displacement. This speed results in debris build-ing up on the prior art wheels.
ipheral land 6. The grooves 4 and 5 preferably are con-tinuous and form the peripheral cutting edges 3 at the intersection of the side 7 and 8 with adjacent grooves 4 and 5 respectively.
Shown in Figures 3 and 4 is a rotary shear or cutting wheel 11. The wheel ll has a center bore 12 for mounting the wheel 11 on a shaft of a rotary shear bias cutter of the type used in the art. The elevated front view as shown in Figure 3 illustrates the wheel 11 with a plurality of projecting segments and cutting edges 13 about the periphery. As shown in E'igure 4 the wheel 11 has peripheral grooves 14 and 15 about land 16. The grooves l~ and 15 preferably are continuous and form the cutting edges 13 at the intersection of the side 17 and 18 with adjacent grooves 14 and 15 respectively.
Shown in Figures 5 and 6 is a rotary shear or cutting wheel 21. The wheel 21 has a center bore 22 for mo~mting the wheel 21 on a shaft of a rotary shear bias cutter of the type used in the art. The elevated front view as shown in Figure 5 illustrates the wheel 21 with a plurality of projecting lobes or saw tooth cutting edges 23 about the periphery. As shown in Figure 6 the wheel 21 has peripheral grooves 24 and 25 about peripheral land 26.
The ~rooves 24 and 25 preferably are continuous and form the cutting edges 23 at the intersection of the side 27 and second side 28 with adjacent grooves 24 and 25 respectively.
The wheels 1, 11 and 21 can be used on right handed or left handed machines. The wheel can be used to cut fabric using the cutting edges at one side of the wheel and then reversed. For example, and referring to Figures 5 and 6, a bed knife 30 is mounted adjacent the wheel side 7. The fabric 32 is cut as the cutting ed~es rotate past the bed knife. After a time period, the wheel can be reversed. In other words side 8 of the wheel is adjacent the bed}~nife.
~37~6 Thè grooves 4, 5, 14, 15, 24 and 25 need not be continuous but are on the portion of the periphery used for cutting. For example and with reference to Figure 5 material e.g. tire cord 32 (shown only in Figure 5) is moved from right to left and the wheel rotates in a clock-wise direction. Moving in this direction the surface 34 - of the cutting edge does the severing. After a time period the bed knife 30 is adjusted for the wheel rotating in a counterclockwise direction and the cloth moving from left to right, or the wheel is mounted on a machine having the material moving from left to right viewed in Figure 5 to sever the fabric 32 using cutting edges 36.
The wheels of the invention can be used with only one groove along side a land. However, usin~ two grooves and a land therebetween permits reversing of the wheel, as discussed above, without debris collecting on the rim cutting edge, e.g. the cutting edge formed at the intersection of the side of the wheel and adjacent groove.
However, one groove and a land allow also for wheel rever-sal in which cutting with one side takes advantage of thegroove and cutting with the opposite side is similar to the prior art 90 or relie~ angle cutting edge. The land prevents marking of the surface of the tire cord as i-t is being cut because the land adjacent the cutting edge is preferably higher or has a larger diameter, thereby moving the fabric away from the opposite cutting edge.
The wheel can be made in a~y manner. For example and referring to Figures 5 and 6, a 16 lobe type solid carbide wheel having a 21~" bore and 6'' Dia. and ~2'1 thick.
On the peripheral surface grooves 24 and 25 of a radius of 1" and a 3/16" land 26 therebetween are formed~ The grooves can be any dimension or shape e.g. a depression formed by a radius or V-shape or flats adjacent and spaced below the land. The larger the radius the smaller the 3~ land for a given wheel thickness. The land surface pro-duced is slightly greater in diameter than the cutting edge. This assures the material will not be marred on the ~37~
unused edges. The principle of the invention can be used on straight edge shear cutters, e.g. a straight member pivoted at one end or also for a guillotine type. The groove and land combination or groove-land-groove combina-tion may be used. Further, the land can be coated with arelease coating.
The groove may extend from one cutting edge to the other. For example Figures 3 and 4 would have one groove replacing grooves 14 and 15 and land 16. In this case the debris would not collect on the cutting edge but may mar the material from the unused cutting edge. The grooves of the invention prevent debris pickup because during cutting the material is supported at the cutting edge and other adjacent surface of which can be the land or other edge or surface which provides a space between the fabric and the bottom of the groove. For the groove-land-groove rim there is a space between the fabric and bo~tom of the groove and after the cut, the material is further spaced from the cutting edge by the higher land.
The wheels are usually rotated at a speed greater than the speed of the fabric when both are compared to llnear displacement. This speed results in debris build-ing up on the prior art wheels.
Claims (14)
1. A rotary shear circular disc having a side, a plurality of projecting segments diposed about the periphery of the disc, each of said segments having a peripheral land and a peripheral groove, the groove being disposed between the land and the side and intersecting the side to form a peripheral cutting edge therewith.
2. The rotary shear of claim 1 wherein the land extends beyond the periphery of the cutting edge.
3. The rotary shear of claim 1 wherein the projecting segments are formed by flats about the periphery.
4. The rotary shear of claim 1 wherein the projecting segments are lobes.
5. The rotary shear of claim 1 wherein the projecting segments are arcuate or scalloped.
6. The rotary shear of claim 1 wherein the disc has a center bore.
7. The rotary shear of claim 1 wherein the disc has a second side and each of said segments has a second peripheral groove disposed between the land and said second side and intersecting said second side to form a second peripheral cutting edge, the land extending out-wardly beyond both cutting edges.
8. A device suitable for cutting tire cord fabrics comprising a bed knife, a rotatable shear wheel mounted for rotation about an axis and adjacent the bed knife, the shear wheel comprising a circular disc having a side, a plurality of projecting segments disposed about the periphery of the disc, each of said segments having a peripheral land and a peripheral groove, the groove and the side intersecting to form a peripheral cutting edge, the shear wheel and the bed knife mounted so that the cutting edges pass said bed knife when the wheel is rotated.
9. The device of claim 8 wherein the segments project radially outwardly from said axis.
10. The device of claim 9 wherein the disc has a second side and eac of said segments has a second per-ipheral groove disposed between the land and said second side to form a second peripheral cutting edge.
11. The device of claim 10 wherein the land extends radially outwardly beyond the cutting edges.
12. The device of claim 11 wherein the pro-jecting segments are formed by flats about the periphery.
13. The device of claim 12 wherein the pro-jecting segments are lobes.
14. The device of claim 13 wherein the pro-jecting segments are arcuate or scalloped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000420197A CA1203746A (en) | 1983-01-25 | 1983-01-25 | Shear wheel for cutting fabrics |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000420197A CA1203746A (en) | 1983-01-25 | 1983-01-25 | Shear wheel for cutting fabrics |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1203746A true CA1203746A (en) | 1986-04-29 |
Family
ID=4124419
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000420197A Expired CA1203746A (en) | 1983-01-25 | 1983-01-25 | Shear wheel for cutting fabrics |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1203746A (en) |
-
1983
- 1983-01-25 CA CA000420197A patent/CA1203746A/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |