WO2002066219A2 - Method and moil configuration for trimming non-circular containers - Google Patents
Method and moil configuration for trimming non-circular containers Download PDFInfo
- Publication number
- WO2002066219A2 WO2002066219A2 PCT/US2001/050569 US0150569W WO02066219A2 WO 2002066219 A2 WO2002066219 A2 WO 2002066219A2 US 0150569 W US0150569 W US 0150569W WO 02066219 A2 WO02066219 A2 WO 02066219A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cam
- moil
- circular product
- container
- product
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000009966 trimming Methods 0.000 title claims description 21
- 238000005520 cutting process Methods 0.000 description 7
- 235000002595 Solanum tuberosum Nutrition 0.000 description 5
- 244000061456 Solanum tuberosum Species 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000004033 plastic Substances 0.000 description 5
- 235000013606 potato chips Nutrition 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 238000013459 approach Methods 0.000 description 3
- 238000000071 blow moulding Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- 241000183290 Scleropages leichardti Species 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 235000012015 potatoes Nutrition 0.000 description 2
- PZBPKYOVPCNPJY-UHFFFAOYSA-N 1-[2-(allyloxy)-2-(2,4-dichlorophenyl)ethyl]imidazole Chemical compound ClC1=CC(Cl)=CC=C1C(OCC=C)CN1C=NC=C1 PZBPKYOVPCNPJY-UHFFFAOYSA-N 0.000 description 1
- 241001470502 Auzakia danava Species 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002991 molded plastic Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus 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
- B26D3/00—Cutting work characterised by the nature of the cut made; Apparatus therefor
- B26D3/16—Cutting rods or tubes transversely
- B26D3/167—Cutting tubes having a non-circular cross-section
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/34—Electrical apparatus, e.g. sparking plugs or parts thereof
- B29L2031/3425—Printed circuits
Definitions
- the invention relates to moil configurations.
- potato chips have been designed with a circular, flat shape so as to efficiently fit within a cylindrical canister (sometimes referred to as a can).
- a cylindrical canister sometimes referred to as a can.
- the size volume of the chip container was dramatically reduced. This development in potato chip technology was widely accepted by the buying public and manufacturers alike. If a noncircular chip or other product were developed, it maybe useful for the shape of the chip canister to follow
- Products such as containers, may be manufactured through the inexpensive process of blow molding plastic into the desired shape.
- the top of the product may include an outwardly extending
- flange 'to serve as a lip to aid in sealing the container with a removable lid.
- a manufacturing handling appendage may be formed on the top lip of the initial product. This manufacturing handling appendage, called a moil, eventually is removed from the initial product to reveal the top lip.
- the moil may be removed by rolling or fixedly rotating the product about its longitudinal axis between two rails where one of the rails includes a stationary knife edge aligned at the moil/container opening trim line. After the moil is removed by this spin trimming process, the container opening is exposed and the container is ready to receive the potato chips and the removable lid.
- the angular relationship between a stationary metal knife blade and the surface being cut may be held relatively constant at each trim point during the spin trimming process.
- An ideal angular relationship may be where the blade edge is held perpendicular to the thickness of the container wall at each cut point. This cut of alignment minimizes the length over which the blade is used for a given trim segment.
- the invention includes a non-circular product having a container and a moil and provides a method to separate the container from the moil at a trim line.
- the container may have a cross section that defines at least one flat side.
- the cross section may be a polygon in the shape of a triangle.
- the polygon cross section may also define a plurality of vertices that define a smooth curve.
- the container includes a lip disposed between the trim line and the container.
- the moil which may be thought of as a manufacturing handling appendage, is connected to the container at the trim line.
- a cam may be formed as part of the moil such that the non-circular product follows the cam profile as the non-circular product rotates. This cam may have at least one lobe.
- the cam assumes the shape of a closed curve of constant width such as that which defines an equilateral configuration.
- One closed curve of constant width that may be used includes a plurality of segments that are derived from the principles of the Reuleaux triangle.
- the cam may be a first cam where the moil includes a second cam such that the first cam is disposed between the container and the second cam.
- This arrangement may form a groove.
- the first cam and the lip form a trim groove having a first opening distance.
- the first cam may be part of a guide where the guide further includes one depression formed into the guide at an angle that presents a second opening distance. This second opening distance may be greater than
- the first cam defines a plurality of
- the non-circular product may be placed in a trimming machine.
- trimming machine having a blade, a first rail, and a second rail, where the trim line aligns
- Figure 1 illustrates a side view of a product embodying principles of the invention
- Figure 2 is an isometric view of the product of Figure 1;
- Figure 3 is a detailed partial view of the product of Figure 1;
- Figure 4A illustrates a Reuleaux triangle
- Figure 4A illustrates a construction of a modified Reuleaux triangle in accordance with principles of the invention
- Figure 5A illustrates a Reuleaux triangle disposed within a square
- Figure 5B illustrates travel of a Reuleaux triangle with a longitudinal channel
- Figure 6 is a top view of the product of Figure 1;
- Figure 7A is a top view of a trimming machine to trim the product of Figure
- Figure 7B is a side view of the trimming machine of Figure 7A.
- Figure 8 illustrates a spin trimming method of the invention.
- the blade becomes more likely to flex so as to result in uneven cuts over a given trim segment. For uneven cuts, an additional facing process would be needed to clean the sealing lip surface finish of each container, resulting in additional manufacturing costs.
- the length over which the blade is used for a given trim segment for non-circular cross section containers maybe at a minimum at some locations and greater than minimum at other locations using the same techniques used for circular cross section containers.
- the length over which the blade is used for a given trim segment may be at a minimum at the corners of a triangular container and increase as the blade approaches the midpoint of each of the three flat sides. At the side midpoint, the knife blade may
- Figure 1 illustrates a side view of product 100.
- Figure 2 is an isometric view of product 100.
- Product 100 may be any item formed of material that may be cut or trimmed. Such materials may include plastic, glass, metal, wood, and rubber.
- product 100 is an item that is the result of a process that includes blow molding melted plastic into a cavity.
- trim line 103 may be thought of as the points at which container 102 and moil 104 may be separated by, for example, the cutting blade of a knife.
- Container 102 maybe any receptacle, such as a carton, can, or jar, in which material may be held or carried. Included with container 102 may be base 106, walls 108, and lip 110. Planes that bisect each of base 106, walls 108, and lip 110 may intersect to define longitudinal axis 112 such that product 100 may be conceived to rotate uniformly about longitudinal axis 112. Base 106 may serve to support container 102 on a surface so that longitudinal axis 112 remains perpendicular to that surface, irrespective of the contents of container 102.
- Walls 108 may extend from base 106 to lip 110 so as to form cavity 114
- Figure 3 Any item may be placed within cavity 114 for storage or transportation.
- a cross section through longitudinal axis 112 of container 102 may define a triangle perimeter as best seen in Figure 2.
- Rounded corners may aid in a moil/container trimming process. Accordingly, where container 102 is the result of a blow molding process, rounded corners 115 may be placed at the three intersections of walls 108.
- Lip 110 may be a projecting edge whose perimeter defines an opening in container 102 to cavity 114.
- the perimeter of lip 110 may circumscribe the perimeter
- walls 108 coincide with the perimeter of walls 108, or be circumscribed by the perimeter of walls 108.
- the features of lip 110 may be adapted to receive a lid, such as a translucent plastic lid generally seen on conventional round potato chip containers.
- trim line 103 may separate container 102 and moil 104.
- moil 104 may be thought of as an appendage that aids in handling product 100 during the manufacturing process.
- the structural configuration of moil 104 may be dictated by the features of the particular process machines that make and handle product 100.
- moil 104 may be lever 116, cap 118, and guide 120.
- Lever 116 may be lever 116, cap 118, and guide 120.
- the features may be a projecting handle having features adapted to make physical, manipulating contact with product 100. These features may include a hexagonal hole disposed through a first side of lever 116 at an orientation that is perpendicular to longitudinal axis 112. A second side of lever 116 may include a thickened portion to serve as a stop for a hexagonal carrying rod inserted into the hexagonal hole. Another feature may be an area along a center line of lever 116 that serves as a mating area for the
- Cap 118 may be a curved surface that radially transitions from lever 116 to locations on product 100 that are furthest away from longitudinal axis 112. This may aid in distributing melted plastic within a blow mold used to form product 100.
- cap 118 may include cam 122 at a location that is remote from longitudinal axis 112.
- Cam 122 may include a perimeter similar to that of guide 120. Where this is the case, cam 122 and guide 120 may define groove 124. Both groove 124 and cam 122 may aid guide 120 in regulating the movement of product 100 about longitudinal axis 112 (roll) and the movement of product 100 about an axis normal to both longitudinal axis 112 and a movement direction of product 100 (yaw).
- Figure 3 is a detailed partial view of product 100. As noted above, partial 100
- Guide 120 may include guide 120.
- Guide 120 maybe any device that acts to influence or regulate the motion of container 102.
- a continuous interface between guide 120 and lip 110 may form trim groove 126.
- Trim groove 126 may. form a track that aids in retaining a knife blade on trim line 103.
- guide 120 may include surfaces 128. Surfaces 128 may be depressions formed into guide 120 at an angle that presents a greater opening distance to trim groove 126. This greater opening distance of trim groove 126 may work to make it less likely that the knife blade will jump the trim groove 126 track.
- guide 120 may also include cam 130 having cam face 132 residing on its periphery.
- Cam 130 may be any eccentric or multiply curved wheel that employs cam face 132 to produce relative motion between trim line 103 and a cutting edge.
- the relative motion may be at least one of variable, reciprocating, alternate, and intermittent motion.
- cam 130 may assume the shape of any closed curve of constant width having more than one curve. When such a closed curve defines an equilateral configuration, that Curve may have at least three arcs.
- Face 132 of cam 130 maybe shaped so as to follow projecting parts in its path. Face 132 may include a groove (not shown) that aids in creating the relative motion between trim line 103 and a cutting edge.
- cam 130 may be positioned on moil 104 so that the centroid of moil 104 coincides with longitudinal axis 112.
- Industrial machinery may move an object forward by rolling that object between two parallel rails as guided by a circular curved surface.
- an aluminum can may be rolled forward by pacing the can between a stationary lower rail and a moving upper rail.
- the circular curved surface helps roll the can forward
- the width of its circular perimeter is constant when measured anywhere across its perimeter.
- the width and the diameter coincide and may be thought of as an ellipse of which the two axes are equal in length.
- the invention may employ principles of the curvilinear triangle known as the Reuleaux triangle so as to take advantage of the constant width and centroid variable movement of the Reuleaux triangle.
- Figure 4A illustrates Reuleaux triangle 400.
- cam 130 is based on Reuleaux triangle 400.
- the Reuleaux triangle is a paradox in that, for a given perimeter measurement, a Reuleaux
- the Reuleaux triangle defining a width will have less cross-sectional area than a circle of the same width.
- a non-circular enclosed curve of constant width has less cross- sectional area than a circle of the same width, but the same perimeter.
- the Reuleaux triangle is the non-circular curve of least cross-sectional area and works well to hog out the straight edges of a square hole near the corners of the hole (see for example, U.S patent 4,074,778, entitled Square Hole Drill).
- the following discussion on the aspects of the Reuleaux triangle is provided to aid in understanding the Reuleaux triangle.
- pick two parallel lines so that the shape, here a circle, lies between the two lines. Move each line towards the shape all the while keeping each line parallel to its original orientation. After both lines touch the shape, the
- distance between the two lines is the width of the shape in the direction of the two
- a shape is of constant width if its width does not depend on the direction from
- Any shape having a constant width may be rolled
- Figure 4 A illustrates a construction of Reuleaux triangle 400.
- Figure 4B illustrates a construction of Reuleaux triangle 400.
- Reuleaux triangle 400 may be developed as follows. Present equilateral triangle 402. Draw three arcs 404, 406, and 408, each centered at one of the vertices
- Figure 5 A illustrates Reuleaux triangle 400 disposed within square 502.
- Reuleaux triangle 400 may define Reuleaux centroid 504 whereas square 502 may
- Reuleaux triangle 400 eventualh will pass over approximately 91% the interior area of square 502, leaving uncovered only four areas 510 totaling about 8%. Centroid 504 does not stay fixed as Reuleaux triangle 400 is rotated about
- path 508 Rather than route a circular course, path 508
- Reuleaux triangle 400 always makes contact with each interior side of the parallel sides of square 502 during the entire rotation time.
- Figure 5B illustrates machinery 512.
- Machinery 512 may include rail 514 and
- rails 514 and 516 may be parallel to one another.
- rails 512 and 514 essentially may be viewed as
- 400 may be rolled between rails 512 and 514 where one rail is held stationary relative
- Reuleaux triangle 400 does not have a constant
- Reuleaux centroid 504 moves in direction 518 along the
- variable curve composed of four arcs of an ellipse identified as path 508.
- one of rail 514 and 516 may have a surface that is not parallel
- rail 514 may transition from flat, parallel
- centroid 504 may trace a level line for path 508 as rail 514 rises and falls.
- Figure 6 is a top view of product 100.
- cam 122 includes a
- trim line 103 may coincide with walls 108.
- Cam 130 may employ Reuleaux triangle 400 with rounded vertices so as to include lobes 602, 604, 606, 608, 610, and 612. If product 100 were rolled in the
- centroid 618 would rise and fall relative to surface 616 as a function of the lobe that is in contact with surface 616.
- trim line 103 would be at a maximum in the shown embodiment. At the perimeter
- FIG. 7A is a top view of trimming machine 700.
- Figure 7B is a side view of trimming machine 700. Included with trimming machine 700 may be blade 702, blade
- conveyor system 706 having conveyor belt 708 disposed about wheel 710 and
- Bottom guide 716 may move
- Blade 702 may be any cutting part of a sharpened tool.
- blade 702 may be any cutting part of a sharpened tool.
- blade 702 is a sharp flat-
- Blade 702 may be disposed at an angle to blade
- Conveyor system 706 may be any contrivance to rotate product 100. This rotation may cause product 100 to move in the direction of arrow 718 or merely to turn around longitudinal axis 112. As noted above, conveyor system 706 may include conveyor belt 708 disposed about wheel 710 and wheel 712. Conveyor belt 708 may be a continuous belt that moves about wheels 701 and 712 in the direction of arrows
- Conveyor belt 708 may be backed by conveyor rail 714.
- Conveyor rail 714 and blade rail 704 may be viewed as two parallel rails of a piece of machinery, here conveyor system 706. With cam 130 having a perimeter of constant width, product 100 maybe moved between conveyor rail 714 and blade rail 704 by conveyor belt 708 over blade 702 at trim line 103. This may work to separate moil 104 from container 102.
- Figure 8 illustrates spin trimming method 800 of the invention.
- product 100 maybe presented at step 802.
- at least one product 100 may be placed on bottom guide 716.
- bottom guide 716 may urge product 100 to move in the direction of arrow 722 so that groove 124 ( Figure 3) may engage guide rod 724 and move along a path as a function of guide rod 724.
- guide rod 724 may elevate product 100 so that cam 130 and cam 122 ( Figure 3)
- conveyor system 706 may move conveyor belt 708 so as to rotate product 100 between blade rail 704 and conveyor rail 714. This rotation may cause product 100, now removed from bottom guide 716 ( Figure 7B), to move, here rotate, in the direction of arrow 722.
- trim line 103 may encounter blade 702.
- the distance between trim line 103 and blade 702 may vary according to the profile of cam 130.
- the distance between trim line 103 and blade 702 may vary according to the discussion in connection with Figure 6. This variation of distance
- trim line 103 and blade 702 may cause the angular relationship between a stationary knife, here blade 702 and the surface being cut, here trim line 103, to vary such that the length over which blade 702 is used for a given trim segment along trim line 103 may be less than the maximum.
- moil 104 maybe separated from container 102 so that container 102 may drop to bottom guide 716.
- moil 104 may be carried off to a recycle container (not shown) and container 102 may be moved in the direction of arrow 722 as now urged by bottom guide 716.
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2002253833A AU2002253833A1 (en) | 2000-12-22 | 2001-12-21 | Method and moil configuration for trimming non-circular containers |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/747,572 US20020079319A1 (en) | 2000-12-22 | 2000-12-22 | Method and moil configuration for trimming non-circular containers |
US09/747,572 | 2000-12-22 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2002066219A2 true WO2002066219A2 (en) | 2002-08-29 |
WO2002066219A3 WO2002066219A3 (en) | 2003-01-16 |
Family
ID=25005678
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2001/050569 WO2002066219A2 (en) | 2000-12-22 | 2001-12-21 | Method and moil configuration for trimming non-circular containers |
Country Status (3)
Country | Link |
---|---|
US (1) | US20020079319A1 (en) |
AU (1) | AU2002253833A1 (en) |
WO (1) | WO2002066219A2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7481961B2 (en) * | 2004-04-01 | 2009-01-27 | Graham Packaging Pet Technologies, Inc. | Multilayer container trimming |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5582322A (en) * | 1994-05-05 | 1996-12-10 | Toter, Inc. | Rotationally-molded refuse container with integrally-molded handle sealed from communication with refuse-carrying compartment |
US5865338A (en) * | 1997-03-24 | 1999-02-02 | Rubbermaid Incorporated | Method for adding strength to a container |
US5866419A (en) * | 1996-09-16 | 1999-02-02 | Meder; Martin G. | Roller bottle |
US5868979A (en) * | 1994-02-18 | 1999-02-09 | Automated Plastic Systems Pty. Ltd. | Automatic rotamoulding apparatus and method of control |
US6422414B1 (en) * | 1998-09-25 | 2002-07-23 | Sumitomo Rubber Industries, Ltd | Wide-mouth container made of synthetic resin and method of manufacturing pressure wide-mouth container |
-
2000
- 2000-12-22 US US09/747,572 patent/US20020079319A1/en not_active Abandoned
-
2001
- 2001-12-21 WO PCT/US2001/050569 patent/WO2002066219A2/en not_active Application Discontinuation
- 2001-12-21 AU AU2002253833A patent/AU2002253833A1/en not_active Abandoned
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5868979A (en) * | 1994-02-18 | 1999-02-09 | Automated Plastic Systems Pty. Ltd. | Automatic rotamoulding apparatus and method of control |
US5582322A (en) * | 1994-05-05 | 1996-12-10 | Toter, Inc. | Rotationally-molded refuse container with integrally-molded handle sealed from communication with refuse-carrying compartment |
US5866419A (en) * | 1996-09-16 | 1999-02-02 | Meder; Martin G. | Roller bottle |
US5865338A (en) * | 1997-03-24 | 1999-02-02 | Rubbermaid Incorporated | Method for adding strength to a container |
US6422414B1 (en) * | 1998-09-25 | 2002-07-23 | Sumitomo Rubber Industries, Ltd | Wide-mouth container made of synthetic resin and method of manufacturing pressure wide-mouth container |
Also Published As
Publication number | Publication date |
---|---|
US20020079319A1 (en) | 2002-06-27 |
WO2002066219A3 (en) | 2003-01-16 |
AU2002253833A1 (en) | 2002-09-04 |
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