This disclosure relates to a manufacturing process using a material frame to secure materials worked during the manufacturing process. More particularly, the present disclosure relates to an agile manufacturing process using a material frame to facilitate variations in the manufacturing process.
Some manufacturing processes require moving in-process work materials between physically distinct manufacturing stations. Such stations may perform sequential operations that require knowledge of the location of the materials, securement of the materials to prevent them from moving relative to the manufacturing station and/or relative to one another, and/or tensioning of the parts. These functions may be provided by station-specific equipment, such as clips, pincers, pins or other devices associated with a particular station, possibly in conjunction with a vision system or human operator to help place or confirm the placement of landmarks on the work materials as needed at each manufacturing station. Alternately, these functions may be provided by a human or robotic operator that positions and maneuvers work materials at a particular station. These systems are cumbersome, complicated, and, particularly with human operators, prone to variation, error, and the possibility of injury. Positioning steps or equipment may also be specific to a particular piece of equipment and a particular work product, meaning that changes in the order of manufacturing steps, including skipping a particular process at a particular piece of equipment, can render equipment or steps for aligning or checking the alignment of work materials unusable.
This disclosure generally relates to a manufacturing process involving a series of operations at physically distinct manufacturing stations. The manufacturing process uses a material frame for securing working material(s). The manufacturing stations at which manufacturing operations are performed are equipped to engage the material frame using an alignment tab. Based on the known position of the engaged alignment tab, data about the frame size and position, and data about prior manufacturing operations performed using the frame, each manufacturing station can determine the position and orientation of the working material(s), without recourse to direct visual inspection or mechanical inspection or manipulation of the working material(s). Each manufacturing station can use an origin point for performing new, location-sensitive operations on the material(s). Either the frame (and, indirectly, the working material or materials within the frame) is mapped based on the origin at the manufacturing station, or the origin can be arbitrarily set based on the position of the frame. In either case, the result is a manufacturing process in which different subsets of operations can be performed, in different orders, at different manufacturing stations, without compromising positional awareness of the working material.
These and other possible features of the claimed invention are described in further detail below.
This disclosure refers to the attached drawing figures, wherein:
Some manufacturing operations are location-sensitive. For example, when seaming two materials together, if the materials are skewed from the intended position, the seam might not catch both or all of the materials intended to be seamed together, or the placement of the seam might be unattractively skewed from the intended aesthetic design. Similarly, if the materials are positioned properly, but the seam is misplaced, the seam may be functionally or aesthetically unacceptable. Similar problems arise with other joining processes, cutting processes, surface treatments, etc. These problems are compounded when a series of operations are performed, because small variances can stack up through the series of operations to create defects at later operations. These problems are further compounded when the series of operations are performed at physically distinct manufacturing stations, where alignment and position change with each move between stations.
Conventional efforts to maintain precise position and alignment of materials, and to align manufacturing operations to the materials, have typically involved either visual inspection or mechanical inspection or added manipulation of the materials. For example, a machine or human visual check may ensure that the materials are where they are expected to be, or a manufacturing station may have a built in mechanical gage, such as a rail that a particular portion of material is pushed flush against, or the parts may be specifically positioned, by human or machine manipulation, for a particular operation. All of these compensation mechanisms add cost to the process. Machine-implemented solutions, particularly mechanical gages, are also tailored to a part as it should arrive at a particular manufacturing station. For example, if two layers cut into star shapes are to be seamed together, the gauge or rail may have a zig-zag pattern to accommodate the star points. If the order of operations changes—say the layers are to be joined and then cut into star shapes—then the mechanical gauge has to be reconfigured. Even a predictable or repeated variation in the order of operations requires physically reconfiguring the manufacturing equipment.
In some aspects, a manufacturing system is disclosed. The manufacturing system comprises a first manufacturing station configured to perform a first manufacturing operation. The manufacturing system comprises a first securing member at the first manufacturing station. The first securing member secures a frame at a known location at the first manufacturing station. The manufacturing system comprises a second manufacturing station configured to perform a second manufacturing operation. The manufacturing system comprises a second securing member at the second manufacturing station. The second securing member secures the frame at a known location at the second manufacturing station. The first securing member and the second securing member are configured to engage with an alignment tab on the frame, such that a position of a material maintained by the frame is known relative to both the first manufacturing station and the second manufacturing station when the first securing member and the second securing member secure the frame respectively.
The material maintained by the frame may be pliable. The frame may comprise a perimeter structure and a support structure within the perimeter structure. The support structure, if present, may be discontinuous. The support structure may be joined to the material maintained by the frame at one or more manufacturing stations. The support structure may be removed from the material maintained by the frame at a manufacturing station. The support structure may be frangible, sacrificial or dissolvable. Each of the manufacturing stations may have an origin determined by reference to the alignment tab and independent of the origin of the other manufacturing stations. The material maintained by the frame may be reversibly joined to the frame without piercing the material. The material maintained by the frame may be reversibly joined to the frame using a gasket-based securement.
In some aspects, a method of manufacturing an article with pliable material is disclosed. The method comprises positioning a first article secured in a frame at a first manufacturing station. The first article is aligned at the first manufacturing station with an alignment tab on the frame removably secured to the first manufacturing station. The method comprises performing a first manufacturing operation at a first location on the first article at the first manufacturing station. The method comprises positioning the first article secured in the frame at a second manufacturing station. The first article is aligned at the second manufacturing station with the alignment tab on the frame removably secured to the second manufacturing station. The method comprises performing a second manufacturing operation at the first location on the first article at the second manufacturing station. The first operation and the second operation are performed at the first location as a result of the known position of the first location relative to the alignment tab of the frame.
The method may further comprise securing the article in the frame. Securing the article in the frame may comprise positioning a pliable material within the frame. Positioning a pliable material within the frame may comprise additive deposition of a material on a support surface within a perimeter of the frame. The method may further comprise removing the article from the frame. Positioning a pliable material within the frame may comprise tensioning the pliable material.
In some aspects, a method of manufacturing a variety of products is disclosed. The method comprises providing a plurality of manufacturing stations, the manufacturing station configured to perform two or more different manufacturing operations. Each of the plurality of manufacturing stations comprises a securement mechanism for releasably engaging an alignment tab. The method comprises providing a plurality of frames, each of the frames configured to support a material or a set of materials. The plurality of frames each comprise at least one alignment tab. The method comprises performing a first series of manufacturing operations on a first subset of the set of materials to yield a first set of manufactured products. The method comprises performing a second series of manufacturing operations on a second subset of the set of materials to yield a second set of manufactured products. The first set of manufactured products differs from the second set of manufactured products in at least one of material content or structure. The manufacturing operations each comprise aligning the alignment tab on one of the plurality of frames with the securement mechanism on the manufacturing station, modifying the material on the frame, and removing the alignment tab on the frame from the securement mechanism on the manufacturing station.
The first series of manufacturing operations may be performed at the same manufacturing stations as the second series of manufacturing operations, in a different order than the second series of manufacturing operations. A starting material in the first series of manufacturing operations may be the same as the second series of manufacturing operations. The manufactured products may be shoe uppers.
The manufacturing methods and equipment described could be used to manufacture a variety of products and intermediate components for products. For example, the manufacturing frame could be used to produce clothing, outerwear, wearable accessories such as hats and scarves, disposable articles such as shoe covers and rain ponchos, pillows and other home décor, and other products or product components that contain textiles, non-woven fabrics, films or other thin, pliable materials. In some aspects, the equipment and methods may be used to produce shoes, and more particularly, shoe uppers.
Even for similar shoes, such as the sneakers depicted in
Optionally, the frame 230 may further include a support structure 210 positioned between top frame 200 and bottom frame 220. As shown, support structure 210 is a grid or mesh, which may facilitate certain manufacturing operations, such as needlework, like sewing, embroidery, edging, etc. Depending on the requirements of particular manufacturing process, it may be desirable to have a discontinuous surface, such as a grid or mesh or a surface with cut-outs that pass through portions of the area within the perimeter of the frame 230. Under other circumstances, a solid support structure 210 may be desirable. For example, the support structure may facilitate heating (as by having a high effusivity, high heat transfer coefficient, or, conversely, a low thermal insulance, by induction heating, or otherwise) or cooling, or could serve as an anvil for sonic welding. As another example, the support structure may provide resistance for stamping or embossing operations. Under still other circumstances, no support structure 210 may be necessary or desirable. As described below, support structure 210 may be designed to facilitate creating a material within the frame 230, as by additive deposition. In other aspects, the frame may be assembled with material 205 layered between the top frame 200 and the bottom frame 220. The material 205 is shown layered over support structure 210 (i.e., closer to the top frame 200), but could be positioned below support structure 210 (i.e., closer to the bottom frame 220), or directly between top frame 200 and bottom frame 220, if no support structure 210 is used. Support structure 210 may be joined to material 205 during the manufacturing process. If joined to material 205, support structure 210 may be removed from material 205 during later processing. For example, support structure 210 may be frangible, sacrificial or dissolvable. Support structure 210, if used, may be a conventional material that is incorporated into the product (that is, support structure 210 may be starting material 205), or the support structure 210 may be destroyed in the course of processing material 205 and/or removing a finished part or part component from frame 230 and/or support structure 210, or the support structure 210 may be a reusable structure that is not incorporated into the part or part component. An exemplary support structure 210 is a woven film of Teflon and/or glass. Additional non-limiting materials that might be suitable for use as a support structure include fiberglass, embroidery floss, polyester, organic cotton, nonwoven fabrics, or combinations thereof. If support structure 210 is a material with a low surface energy that might slip against gasket 393, gasket 390 or gasket 395 (if used), support structure 210 may be joined, as by sewing, thermal bonding, adhesive bonding, etc., to an edge material with a higher surface energy or a textured surface that would be less likely to slip against the gasket.
It should be understood that material 205 is described in the singular, but could be a laminate, distinct layers, or other mixes of materials, at the start of the manufacturing process or as the manufacturing process proceeds. Material 205 may be pliable. That is, if material 205 is suspended under its own weight, as in a fabric drape test, the material will not remain within ±35° of a plane.
As shown in
Frame 230 may further include one or more alignment pins 310. Alignment pins 310 may be present in the top frame 200 or the bottom frame 220, or in a complementary pattern on the top frame 200 and bottom frame 220 (to allow mating of the top frame 200 and bottom frame 220). As shown, alignment pins 310 protrude from an upper surface of bottom frame 220, and correspond to holes 370 in top frame 200. This allows a lower surface of top frame 200 to sit flush against the upper surface of bottom frame 220 when alignment pins 310 are aligned with holes 370. Holes 370 may, but do not have to, go completely through the thickness of top frame 200. Rather, holes 370 should be approximately of the same height into top frame 200 as the height of alignment pins 310 from the upper surface of bottom frame 220. The alignment pins 310 are shown as having the same shape and size as one another, but different alignment pins could be used. For example, alignment pins of different heights and/or cross-sections could be used to insure that the frames are oriented as desired. The placement of the alignment pins could also or alternatively differ along a side of the frame or along different sides of the frame. The spacing of the alignment pins could be uniform along a portion of the perimeter of the frame 230, or along the entire perimeter of frame 230, or could be irregular and/or asymmetric about a center line (along the x-axis or the y-axis) of the frame 230.
Any desired number of alignment pins 310 could be used, from one pin or two pins for the entire frame to as many pins as dimensionally fit on the frame. In some aspects, the alignment pins 310 may be used to orient and/or help secure a pliable material inside the frame. For example, the material may have apertures or be processed to create apertures that fit over the alignment pins. In some aspects, a relatively high number of pins may be desirable, such as greater than 30 pins, or at least 40 pins, or 46 pins. For some working materials and manufacturing operations, as few as 2 pins might work, or 8 pins, or 12 pins. It may be desirable to place alignment pins 310 at intervals between 60 mm and 360 mm (inclusive of endpoints) around the perimeter of the frame 230. If the intervals are irregular, it may be desirable to place the pins no more than 360 mm apart. If the pins are the primary securement mechanism for holding the material in place within the frame, a relatively high number of pins may help prevent the material from moving during manufacturing operations, where relatively small shifts in position—on the order of mm—could sometimes cause a defect in the product or product component. The alignment pins may also be used to align support structure 210, if used. Alternately, support structure 210 could sit between bottom frame 220 and top frame 200 without seating support structure 210 on an alignment pin, particularly, but not exclusively, if support structure 210 is uniform throughout the area 350 within the frame 230 (e.g., a uniform mesh or grid, a uniform solid surface, etc.). Seating one or more apertures in support structure 210 on one or more alignment pins 310 may be more helpful where the support structure 210 is discontinuous or non-uniformly patterned, making the placement of the support structure 210 relative to the frame 230 more important for location determination, as described in further detail below. If the support structure 210 and/or working material 205 are seated on the alignment pins 310, they may be seated on all of the alignment pins 310 present on frame 230, or may be seated on only a subset of the alignment pins 310. If both support structure 210 and working material 205 are seated on a subset of alignment pins 310, they may be seated on the same subset of alignment pins 310, or different subsets of alignment pins 310, or overlapping subsets of alignment pins 310.
The frame may include magnets 320. Magnets 320 may be of opposite polarity in the top frame 200 and bottom frame 220, and may tend to secure the top frame 200 to the bottom frame 220. If magnets are used, it is desirable that they be of sufficient strength to hold the frame together during manufacturing processes. If the frame is to be reused, it is desirable that the magnets be of sufficiently limited strength that the top frame can be separated from the bottom frame to remove parts or spent materials after processing is complete. One of skill in the art will appreciate that these bounds depend on the particular processes used. For example, the magnets may need to be stronger for punching or embossing operations than for some cutting or needlework operations. As another example, relatively weaker magnets may be desirable if the frames are opened by hand by a human operator than if the frames are opened using a pneumatic tool or machine. The number and spacing of the magnets can also be varied to achieve the desired attraction of the bottom frame 220 to the top frame 200. Alternatives to magnets could serve as closures for the frame 230, including, without limitation, screws, bolts-and-nuts, clamps, ties, anchors, hook-and-loop tape, adhesives, and the like. Magnets have been found to be amenable to efficient, automated frame assembly and disassembly, as described in further detail below.
As shown in
As shown in the exploded view of the top surface of bottom frame 220 in
As depicted in
More than one alignment tab 330 may be used, with each alignment tab 330 having at least one alignment element. If more than one alignment tab 330 is used, additional alignment tabs may extend from the same side of the frame (e.g., long side 270, opposite long side 270a, short side 240, opposite short side 240a, or corresponding sides of bottom frame 220), or from a different side of the frame, or from all sides of the frame. If placed on the same side, two or more alignment tabs 330 may be placed near opposite ends of that side. For example, a first alignment tab on long side 270 or 250 may be placed near short side 240 or 260, such as within 200 mm of the short side, or within 150 mm of the short side, or within 100 mm of the short side. A second alignment tab on long side 270 or 250 may be placed near short side 240a or 260a, such as within 200 mm of the short side, or within 150 mm of the short side, or within 100 mm of the short side. If more than one alignment tab is used, the alignment tabs may be of the same structure, and may be oriented similarly or differently (e.g., protrusion up, protrusion down, protrusions sideways, aperture up, aperture down, aperture sideways). If more than one alignment tab is used, the alignment tabs and/or their alignment elements may be symmetrical about a centerline (in the x-direction or in the y-direction) of the frame 230, or may be positioned asymmetrically. Alignment elements on the same tab may be of the same or different types (e.g., pins, apertures, other mechanical fasteners, adhesives, hook-and-loop fasteners, etc.) and the alignment elements on different tabs on the same frame may be of the same or different types.
The alignment element may protrude from the alignment tab 330. For example, the alignment element may be a pin or rod. Less pronounced protrusions should also work, however, a pin or rod may allow for additional precision in engaging the alignment element. Alternately, the alignment element may be an aperture or discontinuity in the surface of the alignment tab 330. The alignment element on alignment tab 330 may be engaged by a securement mechanism on a manufacturing station. For example, as shown in
The frame 230 may be prepared for use in a manufacturing process as depicted in
At step 440, the top frame 200 is removed from the bottom frame 220. The top frame 200 is removed from the bottom frame 220 in that lower surface of the top frame 200 is distanced from the bottom frame 220. In some circumstances, this distance might just enough to remove or add materials between the top frame 200 and the bottom frame 220. In other circumstances, the top frame 200 could be moved away from the bottom frame 220, or vice versa, or even temporarily removed from the assembly/disassembly machine. At step 450, any material 205 and/or support structure 210 remaining in the frame from prior manufacturing operations, and which are no longer desired within the frame, may be removed from the frame, including alignment pins 310, if the material 205 and/or support structure 210 is engaged with the alignment pins 310. The materials removed may be the finished product or product component from prior manufacturing operations, or may be waste from prior manufacturing operations (e.g., if the finished product or product component was removed from the frame at a manufacturing station prior to moving the frame to the assembly/disassembly machine). Of course, if the frame is new or has no materials inside the frame, step 450, and potentially steps 430 and 440, may be unnecessary.
At step 460, new material 205 and/or support structure 210 may be placed in the frame. Placing the material 205 and/or support structure 210 in the frame may include seating the material 205 and/or support structure 210 on one or more alignment pins 310 in frame 230. If the support structure 210 from prior manufacturing operations is to be used again, the support structure 210 may remain in place during the assembly/disassembly processes. If the support structure 210 is intended to remain in place during assembly/disassembly of the frame, support structure 210 may have ejection pins or holes corresponding to frame 230 to facilitate the opening of the frame 230, or, alternatively, may have holes or cut-outs (e.g., irregularities in the perimeter of the support structure 210) so that the support structure is not present near the ejection pins or holes and does not interfere with opening the frame.
Once new material 205 and/or support structure 210 are placed on the frame, the top frame 200 is mated to the bottom frame 220 (if a top frame 200 is used). That is, top frame 200 may be placed on top of alignment pins 310 in bottom frame 220, or, alternatively, alignment pins 310 in top frame 200 may be placed on the bottom frame 220. The top frame 200 may be pressed against the bottom frame 220. This pressing may be used to compress any gaskets 395, material 205, and/or support structure 210 between the top frame 200 and the bottom frame 220 sufficiently to engage the closure system that will hold the top frame 200 and bottom frame 220 together during manufacturing operations (e.g., magnets 320). In some configurations, it will not be necessary to press the top frame 200 and bottom frame 220 together. For example, a magnet or tie-based closure system may pull the frame components together without exerting separate forces on the frame.
The top frame 200 may fit into bottom frame 220 using a tongue-and-groove structure, as shown in
If a gasket 390 around an outer edge of frame 230 is used, it may be secured to the outer edge at step 490. Securing the gasket may involve wrapping portions of material 205 and/or support structure 210 around the frame 230. As noted above, gasket 390 could be placed in an indentation 380 in frame 230 over the wrapped portions of material 205 and/or support structure 210. Securing gasket 390 may be in addition to or in lieu of seating the new material 205 and/or support structure 210 on alignment pins 310 at step 460.
When the new material 205 and/or support structure 210 are secured and the frame 230 is closed, the assembly/disassembly machine may disengage the alignment tab 330. The frame 230 can be removed, manually or mechanically, from the assembly/disassembly machine.
An assembled frame 230 ready for manufacturing operations is shown in
The assembled frame 230 is shown in
When the alignment tabs 330a, 330b on frame 230 are engaged with the securement mechanisms 520a, 520b at the manufacturing station 500, the frame is positioned in a known location and orientation relative to the manufacturing station 500, as shown in
Frame 230 engages with manufacturing station 600 using alignment tabs 330 (shown in
When the frame 230 is removed from manufacturing station 600, material 205 has been modified to in-process material 650, which in this case has been cut partially (e.g., scored) from material 205, as shown in
Even if the origin point used is different between different manufacturing stations, the manufacturing stations can still perform operations at specified locations. In some instances, a first operation performed at a first manufacturing station, such as placing materials at manufacturing station 610 at a first location, and a second operation performed at a second manufacturing station, such as the needlework at manufacturing station 500, are performed at the same location. The location may be relative to the alignment tab of the frame. Of course, sequential operations could also be placed at different locations, and operations placed at the same location could be separated by other operations placed at different locations.
Manufacturing station 640 may comprise a further manufacturing operation. Manufacturing station 640 may comprise a removal and/or inspection station, where a completed product or product component is removed from frame 230, possibly by cutting a product or product component away from a portion of the original material 205 and/or a support structure 210. Alternately or additionally, manufacturing station 640 may comprise an assembly/disassembly machine to remove the product, product component, and/or non-product remnant materials. Manufacturing station 640 may represent a series of further manufacturing operations, in which each manufacturing station engages the alignment tabs on frame 230, performs a manufacturing operation, and disengages the alignment tabs.
As mentioned above, a frame as described can facilitate manufacturing operations from both faces of the frame, or, stated differently, on both faces of a material 205 or support structure 210 secured within the frame 230. A process for manufacturing on both faces of a material is outlined in
The frame 230 can be positioned at a second manufacturing station, shown as step 940. At the second manufacturing station, the frame 230 may be positioned with the up-face 1010 of the frame up 950a (
The methods and equipment described may facilitate manufacturing a variety of products in an agile manufacturing process. Unlike conventional processes, which typically require reconfiguration of equipment to produce different products, the frame and securement mechanisms described above can be used to configure a manufacturing line that can change between different product designs on demand. The manufacturing line could be used efficiently to produce short runs of a few hundred pairs of shoes, or even custom orders of just a single pair of shoes.
As depicted schematically in
A plurality of frames, shown separately in
A first series of manufacturing operations may be performed on a first subset of the starting materials to yield a first set of manufactured products. As shown in
A second series of manufacturing operations is performed on a second subset 1161 of the set of materials to yield a second set of manufactured products 1161a. As shown in
The different series of manufacturing operations may differ in the order of the operations performed, as seen when comparing
Different series of manufacturing operations may comprise entirely different subsets of manufacturing operations (disjoint subsets). Different series of manufacturing operations may comprise different but overlapping subsets of manufacturing operations. That is, there may be shared manufacturing operations among different subsets of manufacturing operations. For example, comparing
Each of the plurality of frames 230 is shown the same in size and configuration. However, different frames, and/or differently configured frames, could be used. For example, different support structures 210 within the perimeter of frame 230 might be used for different series of manufacturing operations and/or for different manufactured products. For example, different products might result from a heat treatment operation depending on whether and what kind of support structure 210 is used. For example, support structure 210 might transfer heat readily, hold heat, or resist heat, and could be present or discontinuous in different areas within the perimeter of the frame 230. As another example, different frames 230 among the plurality of frames may have different alignment pin configurations suited to different materials 205. For example, materials prone to fraying or unraveling may not contact an alignment pin, whereas materials prone to shifting or stretching might be seated on a relatively high number of alignment pins, and asymmetric patterns of alignment pins might be used with materials having different properties in different orientations (e.g., to make sure the material is oriented in the frame as intended with regard, for example, to a selvage edge, which might or might not be present at the time the material is secured in the frame). The plurality of frames may generally have perimeters of the same dimensions, and/or similarly positioned and oriented alignment tabs.
At each of the plurality of manufacturing stations, the manufacturing operation may comprise aligning the alignment tab(s) on one of the plurality of frames with a securement mechanism(s) on the manufacturing station. The manufacturing operation may include modifying the material on the frame. The nature of the modification can vary (e.g., cutting, joining, embellishing, surface treatments, etc.), and the effect of the modification may vary based on the starting material. For example, polishing TPU yields a different result than polishing leather. When the manufacturing operation is complete, the alignment tab on the frame may be removed or ejected from the securement mechanism on the manufacturing station.
It will be understood that certain features and subcombinations are of utility and may be employed without reference to other features and subcombinations. This is contemplated by and is within the scope of the claims.
Since many possible embodiments may be made within the scope of the invention, this description, including the accompanying drawings, is to be interpreted as illustrative and not in a limiting sense.
This application having Ser. No. 16/168,456 and entitled “Agile Manufacturing Processes and Systems” claims the benefit of priority to U.S. Provisional Application No. 62/576,592, entitled “Agile Manufacturing Processes and Systems,” filed on Oct. 24, 2017. Additionally, this application is related by subject matter to U.S. patent application Ser. No. 16/168,364, entitled “Manufacturing Frame,” which claims priority to U.S. Provisional Patent Application No. 62/576,600, entitled “Manufacturing Frame,” filed on Oct. 24, 2017. The entirety of both of the aforementioned applications are incorporated by reference herein.
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