PRESSING A MULTI-LAYERED PREFORM INTO A SHAPED BODY
20220402221 · 2022-12-22
Assignee
Inventors
- VIJAY V. PUJAR (San Diego, CA, US)
- CHRISTOPHER C. KOROLY (Spring Valley, CA, US)
- John S. Linck (Pueblo, CO, US)
- LAMIA SALAH (San Diego, CA, US)
- PAUL E. KUKUCHEK (San Diego, CA, US)
- JOSEPH R. LEMANSKI (Chula Vista, CA, US)
Cpc classification
B29C33/12
PERFORMING OPERATIONS; TRANSPORTING
B29B11/14
PERFORMING OPERATIONS; TRANSPORTING
B29C70/461
PERFORMING OPERATIONS; TRANSPORTING
B29L2031/30
PERFORMING OPERATIONS; TRANSPORTING
B29C51/262
PERFORMING OPERATIONS; TRANSPORTING
B29C70/543
PERFORMING OPERATIONS; TRANSPORTING
B29C49/071
PERFORMING OPERATIONS; TRANSPORTING
B29C51/082
PERFORMING OPERATIONS; TRANSPORTING
B29C70/30
PERFORMING OPERATIONS; TRANSPORTING
B29K2913/00
PERFORMING OPERATIONS; TRANSPORTING
International classification
B29C70/46
PERFORMING OPERATIONS; TRANSPORTING
Abstract
During a manufacturing method, a preform is arranged with a plurality of grips. The preform includes a stack of a plurality of layers of material. The grips are disposed along a periphery of the stack. The preform is formed into a shaped body. The forming includes pressing a die against the stack and gripping the stack with the grips during the pressing of the die. The gripping includes asynchronously gripping the stack with at least some of the grips.
Claims
1. A manufacturing method, comprising: arranging a preform with a plurality of grips, the preform comprising a stack of a plurality of layers of material, and the plurality of grips disposed along a periphery of the stack; forming the preform into a shaped body, the forming comprising pressing a die against the stack and gripping the stack with the plurality of grips during the pressing of the die, and the gripping comprising asynchronously gripping the stack with at least some of the plurality of grips.
2. The manufacturing method of claim 1, wherein the plurality of grips include a first grip and a second grip; and the asynchronously gripping comprises gripping the stack with the first grip for a first period of time; and gripping the stack with the second grip for a second period of time that is different than the first period of time.
3. The manufacturing method of claim 1, wherein the plurality of grips include a first grip and a second grip; and the asynchronously gripping comprises gripping the stack with the first grip starting at a first point in time; and gripping the stack with the second grip starting at a second point in time that is different than the first point in time.
4. The manufacturing method of claim 1, wherein the plurality of grips include a first grip and a second grip; and the asynchronously gripping comprises relinquishing grip of the stack by the first grip at a first point in time; and relinquishing grip of the stack by the second grip at a second point in time that is different than the first point in time.
5. The manufacturing method of claim 1, wherein the plurality of grips include a first grip and a second grip; the first grip and the second grip are disposed longitudinally along the die and to a common lateral side of the die; and the first grip and the second grip asynchronously grip the stack during the pressing of the die.
6. The manufacturing method of claim 1, wherein the plurality of grips include a first grip and a second grip; the first grip and the second grip are disposed on opposing lateral sides of the die; and the first grip and the second grip asynchronously grip the stack during the pressing of the die.
7. The manufacturing method of claim 1, wherein the plurality of layers of material comprise a first layer of material; and the die and the plurality of grips engage the first layer of material during the forming.
8. The manufacturing method of claim 1, wherein the plurality of layers of material comprise a first layer of material and a second layer of material; the die engages the second layer of material during the forming; and the plurality of grips engage the first layer of material during the forming.
9. The manufacturing method of claim 1, wherein the plurality of grips comprise a first grip; and the first grip presses the stack against a base to grip the stack with the first grip.
10. The manufacturing method of claim 9, wherein the plurality of layers of material comprise a first layer of material and a second layer of material; the first layer of material engages and is held by the first grip while the first grip grips the stack; and the second layer of material engages and is slidable against the second grip while the second grip grips the stack.
11. The manufacturing method of claim 9, wherein the plurality of layers of material comprise a first layer of material and a second layer of material; the first layer of material engages and is held by the first grip while the first grip grips the stack; and the second layer of material engages and is held by the second grip while the second grip grips the stack.
12. The manufacturing method of claim 1, wherein the die comprises a first die; and the first die presses the stack into a recess in a second die during the forming.
13. The manufacturing method of claim 12, wherein the recess is configured with a three-dimensional curvature.
14. The manufacturing method of claim 12, wherein an orientation of the first die changes relative to the second side during the forming.
15. The manufacturing method of claim 14, wherein the gripping of the stack with the plurality of grips is synchronized with the changing of the orientation of the first die relative to the second die.
16. The manufacturing method of claim 1, wherein each of the plurality of layers of material comprises woven fibrous material.
17. The manufacturing method of claim 1, wherein the preform is drawn over the die to press the die against the stack.
18. A manufacturing method, comprising: arranging a preform with a plurality of grips, the preform comprising a stack of a plurality of layers of material, and the plurality of grips disposed along a periphery of the stack; and forming the preform into a shaped body, the forming comprising pressing the stack into a recess of a bottom die using a top die; and gripping the stack with the plurality of grips during the pressing of the stack; wherein an orientation of the top die relative to the bottom die changes as the top die moves towards the bottom die.
19. The manufacturing method of claim 1, wherein the gripping comprising asynchronously gripping the stack with a first of the plurality of grips and a second of the plurality of grips.
20. A system for forming a preform into a shaped body, the preform comprising a stack of a plurality of layers of material which include a first layer of material and a second layer of material, the system comprising: a first die; a second die comprising a recess, the first die configured to press the stack of the plurality of layers of material into the recess where the first die engages the first layer of material and the second die engages the second layer of material; and a plurality of grips arrangeable along a periphery of the stack of the plurality of layers of material, the plurality of grips configured to selectively grip the stack of the plurality of layers of material as the first die presses the stack of the plurality of layers of material into the recess, the plurality of grips including a first grip and a second grip that is discretely actuatable from the first grip.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
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DETAILED DESCRIPTION
[0039] All ranges and ratio limits disclosed herein may be combined. It is to be understood that unless specifically stated otherwise, references to “a,” “an,” and/or “the” may include one or more than one and that reference to an item in the singular may also include the item in the plural.
[0040] The detailed description of exemplary embodiments herein makes reference to the accompanying drawings, which show exemplary embodiments by way of illustration and its best mode, and not of limitation. While these exemplary embodiments are described in sufficient detail to enable those skilled in the art to practice the invention, it should be understood that other embodiments may be realized and that logical, chemical and mechanical changes may be made without departing from the spirit and scope of the invention. For example, the steps recited in any of the method or process descriptions may be executed in any order and are not necessarily limited to the order presented. Moreover, many of the functions or steps may be outsourced to or performed by one or more third parties. Furthermore, any reference to singular includes plural embodiments, and any reference to more than one component or step may include a singular embodiment or step. Also, any reference to attached, fixed, connected or the like may include permanent, removable, temporary, partial, full and/or any other possible attachment option. Additionally, any reference to without contact (or similar phrases) may also include reduced contact or minimal contact.
[0041]
[0042] Referring to
[0043] The bottom die 24 is configured with at least one die recess 44; e.g., an aperture such as a pocket, a channel, a groove, etc. The die recess 44 of
[0044] The recess surface 48 is a concave or concave-convex surface and may have a curved geometry; e.g., a three-dimensional (3D) curvature. The recess surface 48 of
[0045] Referring to
[0046] The top die 25 includes a die base 64 and at least one die protrusion 66 connected to (e.g., formed integral with) the die base 64. The die protrusion 66 of
[0047] The protrusion surface 70 of
[0048] Referring to
[0049] Referring to
[0050] Referring to
[0051] The grip surface 82 is configured with a relatively high coefficient of static friction and/or kinetic friction, whereas each bottom die top surface 46 may be configured with a relatively low coefficient of static friction and/or kinetic friction. The grip surface 82, for example, may be textured whereas each bottom die top surface 46 may be smooth; e.g., polished. The grip surface 82 and, more particularly, the grip member 76 may also or alternatively be formed from a material with a higher coefficient of static friction and/or kinetic friction than the material of the bottom die 24.
[0052] The grip surface 82 of
[0053] Referring to
[0054]
[0055] In step 702, the preform 88 is provided. This preform 88 may be configured as a multi-layered preform. The preform 88 of
[0056] Each layer of material 92 may share a common (e.g., the same) construction and/or material makeup. Each layer of material 92 in the stack 90, for example, may be formed by a sheet/layer of fibrous material; e.g., woven carbon fiber, woven oxidized polyacrylonitrile (PAN) fibers, non-crimp fabric, etc. One or more or all of the layers of material 92 may each be impregnated with a polymer matrix; e.g., thermoset material or thermoplastic material. One or more or all of the layers of material 92 may alternatively each be unimpregnated (e.g., only include the fibrous material) where, for example, the preform material is impregnated subsequent to formation of the shaped body 22. The method 700 of the present disclosure, however, is not limited to such exemplary layer materials. For example, in other embodiments, one or more or all of the layers of material 92 may each be formed from a polymer material without fiber-reinforcement; e.g., a thermoplastic sheet.
[0057] In step 704, the preform 88 is arranged with the bottom die 24 and the grips 26. The preform 88 and its stack 90 of
[0058] In the arrangement of
[0059] In step 706, the preform 88 is formed into the shaped body 22. During this formation step 706, the top die 25 may move (e.g., downward) vertically from the (e.g., open) position of
[0060] During the pressing, the grips 26 selectively grip the preform 88 and its stack 90 of the layers of material 92. Each grip 26 and its grip member 76 of
[0061] The differential movement between the layers of material 92 in the stack 90 may be tuned by individually activating and deactivating the grips 26 depending on the specific configuration of the die recess 44, the die protrusion 66 and/or material properties of the preform 88 and its stack 90. The actuation system 28, for example, may asynchronously activate and/or deactivate the grips 26 along each side of the die recess 44; e.g., along each side 36, 38. For example, referring to
[0062] Various other activation and deactivation programs are possible in addition or alternatively to that described above. For example, some of the grips 26 may be activated and/or deactivated synchronously whereas one or more other grips 26 may be activated and/or deactivated asynchronously. One or more of the grips 26 may be activated for a different period of time (e.g., duration) than another one or more of the grips 26. Some or all of the grips 26 may be synchronously or asynchronously activated and/or deactivated depending on location; e.g., longitudinal location, lateral location, etc. Some or all of the grips 26 may be activated and/or deactivated in stages, where actuation of the grips 26 may be synchronously or asynchronously depending on the stage. The present disclosure therefore is not limited to any particular grip activation or deactivation programs.
[0063] To further tune the forming of the shaped body 22, the orientation of the top die 25 relative to the bottom die 24 may change during its vertical stroke; e.g., movement from the position of
[0064] In step 708, the shaped body 22 is released from the formation system 20. The top die 25 of
[0065] In some embodiments, referring to
[0066] In some embodiments, referring to
[0067] In some embodiments, one or more of the grips 26 may be arranged at the ends 32 and 34 of the bottom die 24.
[0068] In some embodiments, referring to
[0069] In some embodiments, referring to
[0070] In some embodiments, each of the grips 26 may move along a single axis; e.g., vertically up and down. In other embodiments, one or more or all of the grips 26 may each move along multiple axes; e.g., vertically up and down, horizontally side to side, and/or horizontally in and out, etc. One or more of all of the grips 26 may also or alternatively each rotate about one or more axes; e.g., the x-axis, the y-axis and/or the z-axis.
[0071] In some embodiments, referring to
[0072] The formation system 20 and its components 24 and 25 are described above using the terms “bottom” and “top” with reference to exemplary orientations in the drawings. The present disclosure, however, is not limited to any particular formation system orientations. For example, in other embodiments, the die 24 may alternatively be configured as a top die and the die 25 may alternatively be configured as a bottom die.
[0073] Systems and methods are provided. In the detailed description herein, references to “various embodiments,” “one embodiment,” “an embodiment,” “an example embodiment,” etc., indicate that the embodiment described may include a particular feature, structure, or characteristic, but every embodiment may not necessarily include the particular feature, structure, or characteristic. Moreover, such phrases are not necessarily referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with an embodiment, it is submitted that it is within the knowledge of one skilled in the art to affect such feature, structure, or characteristic in connection with other embodiments whether or not explicitly described. After reading the description, it will be apparent to one skilled in the relevant art(s) how to implement the disclosure in alternative embodiments.
[0074] Benefits, other advantages, and solutions to problems have been described herein with regard to specific embodiments. However, the benefits, advantages, solutions to problems, and any elements that may cause any benefit, advantage, or solution to occur or become more pronounced are not to be construed as critical, required, or essential features or elements of the invention. The scope of the invention is accordingly to be limited by nothing other than the appended claims, in which reference to an element in the singular is not intended to mean “one and only one” unless explicitly so stated, but rather “one or more.” Moreover, where a phrase similar to “at least one of A, B, or C” is used in the claims, it is intended that the phrase be interpreted to mean that A alone may be present in an embodiment, B alone may be present in an embodiment, C alone may be present in an embodiment, or that any combination of the elements A, B and C may be present in a single embodiment; for example, A and B, A and C, B and C, or A and B and C. Furthermore, no element, component, or method step in the present disclosure is intended to be dedicated to the public regardless of whether the element, component, or method step is explicitly recited in the claims. No claim element herein is intended to invoke 35 U.S.C. 112(f) unless the element is expressly recited using the phrase “means for.” As used herein, the terms “comprises,” “comprising,” or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.