Special-shaped double-layer conductive cloth wrapped foam component and its production process and wrapping jig

Abstract

The present invention relates to a special-shaped double-layer conductive cloth wrapped foam component, which has a foam, and the upper and lower surfaces of the foam and the outer side surface of the main body and the end surface of the curved part are wrapped and covered with a first conductive cloth; the outer surface of the first conductive cloth on the lower surface of the foam is also compounded with a layer of second conductive cloth; a layer of conductive rubber strip with the same shape as the second conductive cloth at the edge is attached to the inner edge of the upper surface of the foam and the extended surface of the second conductive cloth. The present invention adopts a double-layer conductive cloth structure and a special shape of the foam, and a spacing part is set at the curved part of the conductive cloth to avoid wrinkles of the conductive cloth, so that the conductive cloth wrapped foam component can meet the use requirements of specific products, thereby meeting market needs; the production process of the product is simplified as much as possible compared to its special shape, which is conducive to improving production efficiency, and at the same time, the product is assembled and wrapped in steps with a jig, and the product is accurately wrapped and positioned with high precision, which can ensure the quality stability of the product.

Description

Technical Field

[0001] The invention relates to the technical field of composite die-cutting materials for the periphery of electronic products, and in particular to a special-shaped double-layer conductive cloth wrapped foam component and a production process and a wrapping jig thereof. Background Art

[0002] At present, the design of electronic products such as computers, mobile phones, and tablets is becoming more and more sophisticated, and the size requirements are getting higher and higher, so the requirements for various composite die-cut components used inside them are also getting higher and higher. In some electronic products, it is necessary to use a special shape of conductive cloth to wrap the foam component. This type of foam component is difficult to produce in the traditional way of first producing the foam component and then wrapping the conductive cloth, so it is necessary to develop a new production process and related jigs. Summary of the invention

[0003] The purpose of the present invention is to overcome the above-mentioned deficiencies of the prior art and to provide a special-shaped double-layer conductive cloth wrapped foam component and its production process and wrapping jig.

[0004] The technical solution adopted by the present invention is: a special-shaped double-layer conductive cloth wrapped foam component, the conductive cloth wrapped foam component has a foam, the foam has a long strip-shaped main body and a curved part integrally formed with the main body and located at both ends of the main body, the inner angle of the curved part and the main body is in an arc chamfer shape, and the outer angle of the curved part and the main body is provided with a concave part; the upper and lower surfaces of the foam and the outer side surface of the main body and the end surface of the curved part are wrapped and covered with a first conductive cloth; the outer surface of the first conductive cloth on the lower surface of the foam is also compounded with a layer of second conductive cloth, and the second conductive cloth The main body is of the same shape as the lower surface of the foam, and the inner edge of the second conductive cloth extends to form an extension portion that is bent along the inner side of the foam toward the upper surface and wraps around the inner edge of the upper surface of the foam, and a number of spacers are provided at the two ends of the extension portion located inside the bent portion; a layer of conductive rubber strip with the same shape as the second conductive cloth at the edge is attached to the inner edge of the upper surface of the foam and the surface of the extension portion of the second conductive cloth, and a layer of PET protective film is also attached to the outer surface of the conductive rubber strip; a bottom layer of PET silicone protective film is also compounded on the lower surface of the foam and the outer surface of the second conductive cloth.

[0005] The bottom PET silicone protective film also covers the inner area of ​​the foam bending part, and the inner surface of the bottom PET silicone protective film is also compounded with a PET release film.

[0006] The present invention also provides a production process for a special-shaped double-layer conductive cloth wrapped foam component, which comprises the production steps of producing a first conductive cloth wrapped foam component, a second conductive cloth component, a conductive adhesive component, a surface layer PET protective film component and a bottom layer PET silicone protective film component respectively through a flat knife die cutting process;

[0007] The production process of the foam and first conductive cloth wrapped component is as follows: firstly, a layer of the first conductive cloth tape is wrapped around the outer surface of the foam material strip, so that the foam material strip and the first conductive cloth tape are just wrapped and fitted, and then, the foam material strip wrapped with the first conductive cloth is die-cut to form a first conductive cloth wrapped foam component, wherein the foam of the first conductive cloth wrapped foam component has a main body and a curved part, and the upper and lower surfaces of the foam, the outer side surface of the main body, and the end surface of the curved part are wrapped and covered with the first conductive cloth, and the inner side surface of the main body and the inner side surface, outer side surface, and concave part of the curved part are directly exposed;

[0008] The second conductive cloth assembly comprises a first release paper, a second conductive cloth and a first release film in sequence, wherein the second conductive cloth body is of a shape equivalent to the lower surface of the foam, and the inner edge of the second conductive cloth extends to form an extension portion that is bent along the inner side of the foam toward the upper surface and wraps and covers the inner edge of the upper surface of the foam, and a plurality of spacers are provided at the parts of the two ends of the extension portion located inside the bending portion, and two crease lines are formed on the extension portion;

[0009] The conductive adhesive assembly includes a second release paper, a conductive adhesive strip and a second release film in sequence, and the shape of the conductive adhesive strip is equivalent to the shape of the edge of the extended portion of the second conductive cloth;

[0010] The bottom PET silicone protective film assembly includes a PET acrylic protective film, a bottom PET silicone protective film, a PET release film and a third release paper in sequence; wherein the shape of the bottom PET silicone protective film is equivalent to the spatial shape of the inner side of the foam and its curved part along the length direction; the shape of the PET release film is equivalent to the shape of the spatial area inside the foam ；

[0011] Their assembly steps are as follows:

[0012] Step a: first peel off the first release paper in the second conductive cloth component and position it on the first jig, and then position the foam component wrapped with the first conductive cloth on the second jig corresponding to the first jig, and then combine the second jig with the first jig to make the second conductive cloth and the foam component stick together and then demold, at this time, the second conductive cloth is attached to the surface of the first conductive cloth on one side of the foam component, and the extension part of the second conductive cloth protrudes from the inner edge of the foam; then peel off the first release film on the second conductive cloth component;

[0013] Step b: Position the second conductive cloth foam component in a positioning and wrapping jig, the positioning and wrapping jig having a foam positioning groove having a shape similar to that of the foam. When the foam component is placed, the extension of the second conductive cloth is blocked by the side wall of the foam positioning groove and folded and lifted toward the inner wall of the foam, and then the lifted part is folded toward the upper surface of the foam by the shovel of the positioning and wrapping jig and pasted to the edge of the first conductive cloth compounded on the upper surface of the foam;

[0014] Step c: sticking a conductive adhesive strip to the inner edge of the upper surface of the foam to cover the extended portion of the second conductive cloth, and compounding a surface layer of PET protective film on the surface of the conductive adhesive strip;

[0015] Step d: Take the foam conductive cloth conductive adhesive assembly out of the positioning and wrapping jig, and adhere the bottom PET silicone protective film to the lower surface of the foam.

[0016] In the above production process: the first jig has a conductive cloth positioning concave surface corresponding to the outer contour of the second conductive cloth and is provided with a positioning hole, and correspondingly, the second jig has a foam positioning concave surface whose position corresponds to the conductive cloth positioning concave surface of the first jig and whose shape matches the shape of the foam, and the depth of the foam positioning concave surface is less than the thickness of the foam, and the second jig is provided with a positioning column corresponding to the positioning hole on the first jig; the second conductive cloth and the foam are positioned respectively by the first jig and the second jig, and then the second conductive cloth and the foam are quickly bonded to each other by aligning and closing the mold.

[0017] The present invention also provides a positioning and wrapping jig for wrapping a special-shaped double-layer conductive cloth with a foam component. The positioning and wrapping jig includes a mounting substrate, a foam template is mounted on the mounting substrate, a foam positioning groove corresponding to the shape of the foam is opened on the foam template, a first shovel plate, a second shovel plate and a third shovel plate in contact with the upper surface of the foam template are arranged on the upper surface of the foam template and on the upper side of the foam positioning groove, and a first cylinder, a second cylinder and a third cylinder are respectively arranged on the mounting substrate, which correspond to the first shovel plate, the second shovel plate and the third shovel plate and drive them.

[0018] Specifically, in the above-mentioned wrapping jig, the first cylinder directly drives the first shovel plate; the second cylinder and the third cylinder indirectly drive the second shovel plate and the third shovel plate respectively; the second shovel plate and the second cylinder, the third shovel plate and the third cylinder are respectively arranged on two cylinder seats flush with the foam template; wherein, the first shovel plate is respectively provided with a first inclined surface facing backward at the two corners of the tail, and the tail edge of the first shovel plate is also provided with an "L"-shaped bending portion on both sides, and the outer end of the "L"-shaped bending portion is provided with a second inclined surface facing forward; an intermediate transmission is respectively provided on the two cylinder seats and on the rear sides of the two ends of the tail of the first shovel plate The intermediate transmission plate has a third inclined surface opposite to and in contact with the second inclined surface, the side of the intermediate transmission plate also has a rectangular portion embedded in the "L"-shaped bending portion area, and the front of the intermediate transmission plate is also provided with a fourth inclined surface opposite to the first inclined surface of the first shovel plate; the second shovel plate and the third shovel plate respectively have a fan-shaped portion corresponding to the shape of the foam bending portion and a tail handle portion extending from the rear of the fan-shaped portion into between the first and fourth inclined surfaces, and the terminal end of the tail handle portion is in contact with the rectangular portion of the intermediate transmission plate; the second cylinder and the third cylinder are respectively connected to and drive the intermediate transmission plate on their side.

[0019] In the above-mentioned wrapping jig, side limit plates and upper limit plates are respectively installed on the outside and top of the intermediate transmission plate, the second shovel plate and the third shovel plate. Strip limit holes are respectively opened on the intermediate transmission plate and the upper limit plate. Limit columns passing through the strip limit holes are respectively provided on the two cylinder seats. A transition slope and a step limit surface are also provided at the front end of the side limit plate.

[0020] In the above-mentioned wrapping jig, a vertical guide column is respectively provided on both sides of the foam template, and a heating pressing block is installed between the vertical guide columns. The lower surface of the heating pressing block is formed with a protruding pressing strip with a shape equivalent to that of the conductive rubber strip.

[0021] In the above-mentioned wrapping jig, a plurality of concave notches intersecting with the foam positioning grooves are provided on the foam template and at the outer edge of the foam positioning grooves.

[0022] The present invention adopts the above-mentioned structure and production process, jig, double-layer conductive cloth structure and special shape of foam, and sets a spacer at the bending part of the conductive cloth wrapping to avoid wrinkles of the conductive cloth, so that the conductive cloth wrapped foam component can be suitable for the use requirements of specific products, thereby meeting market needs; the production process of the product is simplified as much as possible compared with its special shape, which is conducive to improving production efficiency. At the same time, the jig is used for step-by-step assembly and wrapping, and the product wrapping positioning is accurate and high in precision, which can ensure the quality stability of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the exploded structure of the conductive cloth wrapped foam component of the present invention;

[0024] Figure 2 It is a schematic diagram of the combined structure after peeling off the surface PET protective film;

[0025] Figure 3 This is a schematic diagram of the structure of the first conductive cloth wrapped with foam;

[0026] Figure 3-1 It is a schematic diagram of the die-cutting die of the first conductive cloth wrapped foam component;

[0027] Figure 3-2 yes Figure 3-1 Schematic diagram of the die-cutting mold after closing;

[0028] Figure 4 is an exploded schematic diagram of the second conductive fabric assembly;

[0029] Figure 4-1 It is molding Figure 4 Schematic diagram of the die-cutting die of the second conductive fabric component;

[0030] Figure 5 is an exploded schematic diagram of the conductive adhesive assembly;

[0031] Figure 6 This is a schematic diagram of the decomposition of the bottom PET silicone protective film;

[0032] Figure 7 , Figure 8 It is a plan view schematic diagram of a first jig and a second jig for laminating a second conductive cloth and a first conductive cloth-wrapped foam component in the present invention;

[0033] Fig. 9 It is a structural schematic diagram of a positioning and wrapping jig for wrapping the second conductive cloth with a flanging in the present invention;

[0034] Fig.10 , Fig.11 It is a partial schematic diagram of the positioning package fixture;

[0035] Fig.12 yes Fig.11 A partial enlarged view of

[0036] Fig.13 It is a schematic diagram of the structure of the heating pressing block in the positioning and wrapping fixture of the present invention. DETAILED DESCRIPTION

[0037] like Figure 1-Figure 2As shown, the present invention is a special-shaped double-layer conductive cloth wrapped foam component, which has a foam 1, and the foam 1 has a long strip-shaped main body 11 and a curved portion 12 integrally formed with the main body 11 and respectively located at both ends of the main body 11, the inner corner of the curved portion 12 and the main body 11 is in a circular arc chamfer shape, and a recess 13 is provided at the outer corner of the curved portion 12 and the main body 11; the upper and lower surfaces of the foam 1 and the outer side surface of the main body and the end surface of the curved portion are wrapped and covered with a first conductive cloth 2, and the inner side surface of the main body 11 and the inner side surface, outer side surface and recess 13 of the curved portion 12 are directly exposed without being covered by the first conductive cloth 2; the outer surface of the first conductive cloth 2 on the lower surface of the foam 1 is also compounded with a layer of second conductive cloth 3, the main body of the second conductive cloth 3 is of the same shape as the lower surface of the foam 1, and the inner edge of the second conductive cloth 3 extends to form There is an extension part 31 which is bent toward the upper surface along the inner side of the foam 1 and wraps around the inner edge of the upper surface of the foam 1. The two ends of the extension part 31 are provided with a plurality of spacers 32 at the inner side of the curved part 12. Because the inner diameter of the curved part 12 becomes smaller, if there is no spacer, the conductive cloth will be wrinkled and overlapped when the extension part 31 wraps the curved part 12, thereby causing the product size accuracy to change and affecting the product quality. After the two ends of the extension part of the spacer 32 are provided to wrap the curved part of the foam, the second conductive cloth 3 will not be wrinkled and overlapped. A conductive rubber strip 4 having a shape equivalent to that of the second conductive cloth at the edge is attached to the inner edge of the upper surface of the foam 1 and the surface of the extension part 31 of the second conductive cloth 3, and a layer of PET protective film 41 is also attached to the outer surface of the conductive rubber strip 4. A bottom layer of PET silicone protective film 5 is also compounded on the lower surface of the foam 1 and the outer surface of the second conductive cloth 3.

[0038] The bottom PET silicone protective film 5 covers the inner area of ​​the curved portion 12 of the foam 1, and the inner surface of the bottom PET silicone protective film 5 is also compounded with a PET release film 51, which can keep the product clean and tidy and is easy to peel off.

[0039] The present invention also provides a production process for a special-shaped double-layer conductive cloth wrapped foam component, which comprises the production steps of producing a first conductive cloth wrapped foam component, a second conductive cloth component, a conductive adhesive component, a surface layer PET protective film component and a bottom layer PET silicone protective film component respectively through a flat knife die cutting process;

[0040] Among them, combined Figure 3 As shown in FIG. 1 , the production process of the foam and first conductive cloth wrapped component is as follows: first, a layer of the first conductive cloth tape is wrapped around the outer surface of the foam material tape with a rectangular cross section, so that the foam material tape and the first conductive cloth tape are just wrapped and fitted, and then, the foam material tape wrapped with the first conductive cloth is die-cut to form the first conductive cloth wrapped foam component. The upper and lower mold plane diagrams of the die-cutting mold are shown in FIG. Figure 3-1As shown, the mold is provided with three sets of blades, that is, three first conductive cloth wrapped foam components can be formed each time, the upper mold surface is formed with a foam contour line blade R11 and a positioning column R12, and the lower mold surface is formed with a material strip groove R13 of a limited conductive cloth wrapped foam material strip and a positioning hole R14 corresponding to the positioning column R12, and the foam of the formed first conductive cloth wrapped foam component has a main body and a curved part, and the upper and lower surfaces of the foam 1 and the outer side surface of the main body 11 and the end surface of the curved part 12 are wrapped and covered with the first conductive cloth, and the inner side surface of the main body 11 and the inner side surface, outer side surface and concave part of the curved part 12 are directly exposed;

[0041] For example Figure 4 As shown, the second conductive cloth assembly includes a first release paper 301, a second conductive cloth 3 and a first release film 302 in sequence, wherein the main body of the second conductive cloth 3 is similar in shape to the lower surface of the foam 1, and the inner edge of the second conductive cloth 3 extends to form an extension portion 31 that is bent along the inner side of the foam 1 toward the upper surface and wraps and covers the inner edge of the upper surface of the foam 1, and the two ends of the extension portion 31 are located inside the bending portion. A plurality of spacers 32 are provided, and two crease lines 33 are formed on the extension portion; Figure 4-1 It is molding Figure 4 Schematic diagram of a die-cutting die for a second conductive fabric assembly, wherein the die is provided with a conductive fabric contour line blade R301 for forming the outer contour of the second conductive fabric and a crease convex line R302 for forming two crease lines;

[0042] For example Figure 5 As shown, the conductive adhesive assembly includes a second release paper 401, a conductive adhesive strip 4 and a second release film 402 in sequence, and the shape of the conductive adhesive strip 4 is equivalent to the edge shape of the extension portion 31 of the second conductive cloth 3;

[0043] For example Figure 6 As shown, the bottom PET silicone protective film assembly includes a PET acrylic protective film 52, a bottom PET silicone protective film 5, a PET release film 51 and a third release paper 53 in sequence; wherein the shape of the bottom PET silicone protective film is equivalent to the spatial shape of the inner side of the foam and its curved portion along the length direction, that is, it covers the foam and the inner space area; the shape of the PET release film is equivalent to the shape of the space area inside the foam, which plays the role of isolation and facilitating assembly construction and easy peeling during subsequent use;

[0044] The above-mentioned production process of producing the first conductive cloth wrapped foam component, the second conductive cloth component, the conductive adhesive component, the surface PET protective film component and the bottom PET silicone protective film component through the flat knife die-cutting process all belong to known technologies. It only needs to design the corresponding die-cutting mold according to the designed foam shape, conductive cloth shape, and conductive adhesive strip shape, so it will not be repeated here.

[0045] Their assembly steps are as follows:

[0046] Combination Figure 7 , Figure 8 As shown, step a: first peel off the first release paper in the second conductive cloth component and position it on the first jig A, and position the foam component wrapped with the first conductive cloth on the second jig B corresponding to the first jig A, and combine the second jig B with the first jig A to make the second conductive cloth 3 and the foam component stick together and then demold, at this time, the second conductive cloth 3 is attached to the surface of the first conductive cloth 2 on one side of the foam component, and the extension part 31 of the second conductive cloth 3 protrudes from the inner edge of the foam 1; then peel off the first release film 302 on the second conductive cloth 3 component;

[0047] Recombination Figure 9-12 As shown, step b: positioning the second conductive cloth foam component in the positioning and wrapping jig C, the positioning and wrapping jig C has a foam positioning groove C101 with a shape comparable to the foam 1, when the foam component is placed, the extension portion 31 of the second conductive cloth 3 is blocked by the side wall of the foam positioning groove C101 and folded and tilted toward the inner wall of the foam, and then the tilted portion is folded toward the upper surface of the foam 1 by the shovel of the positioning and wrapping jig C and adhered to the edge of the first conductive cloth 2 compounded on the upper surface of the foam 1;

[0048] Step c: stick the conductive rubber strip 4 to the inner edge of the upper surface of the foam 1 to cover the extension portion 31 of the second conductive cloth 3, and laminate a surface layer PET protective film 41 on the surface of the conductive rubber strip 4;

[0049] Step d: Take out the foam conductive cloth conductive adhesive assembly from the positioning and wrapping fixture C, and adhere the bottom PET silicone protective film 5 to the lower surface of the foam 1.

[0050] In the above production process: the first jig A has a conductive cloth positioning concave surface corresponding to the outer contour of the second conductive cloth 3 and is provided with a positioning hole, and correspondingly, the second jig B has a foam positioning concave surface whose position corresponds to the conductive cloth positioning concave surface of the first jig A and whose shape matches the shape of the foam 1, and the depth of the foam positioning concave surface is less than the thickness of the foam, and the second jig B is provided with a positioning column corresponding to the positioning hole on the first jig A; the second conductive cloth 2 and the foam 1 are positioned respectively by the first jig A and the second jig B, and then the second conductive cloth can be quickly bonded to the foam by aligning and closing the mold.

[0051] In this embodiment, the second conductive cloth component and the conductive adhesive component are die-cut to produce two pieces of the second conductive cloth and the conductive adhesive strip in sequence during die-cutting production, thereby saving materials and improving efficiency.

[0052] Combination Figure 9-11As shown, the present invention also provides a positioning and wrapping jig C for wrapping a foam component with a special-shaped double-layer conductive cloth, the positioning and wrapping jig C comprising a mounting substrate C2, a foam template C1 is mounted on the mounting substrate C2, a foam positioning groove C101 having a shape equivalent to that of the foam 1 is provided on the foam template C1, a first shovel plate C31, a second shovel plate C32 and a third shovel plate C33 in contact with the upper surface of the foam template C1 are provided on the upper surface of the foam template C1 and on the upper side of the foam positioning groove C101, and a first cylinder C21, a second cylinder C22 and a third cylinder C23 corresponding to and driving the first shovel plate C31, the second shovel plate C32 and the third shovel plate C33 are respectively provided on the mounting substrate C2; ​​the first shovel plate C31 is located in the middle, opposite to the main body 11 of the foam 1, and the second shovel plate C32 and the third shovel plate C33 are symmetrically located on both sides of the first shovel plate C31 and opposite to the bending portion 12 of the foam 1;

[0053] Specifically, in the above-mentioned wrapping jig, the first cylinder C21 directly drives the first shovel plate C31; the second cylinder C22 and the third cylinder C23 indirectly drive the second shovel plate C32 and the third shovel plate C33 respectively; the second shovel plate C32 and the second cylinder C22, the third shovel plate C33 and the third cylinder C23 are respectively arranged on two cylinder seats C4 flush with the foam template C1; wherein, the first shovel plate C31 is respectively provided with a first inclined surface C311 facing backward at the two corners of the tail, and the tail edge of the first shovel plate C31 is also provided with an "L"-shaped bending portion C312 on both sides, and the outer end of the "L"-shaped bending portion C312 is provided with a second inclined surface C313 facing forward; an intermediate transmission plate C41 is respectively provided on the two cylinder seats C4 and at the rear sides of the two ends of the tail of the first shovel plate C31, and the intermediate transmission plate C41 is The plate C41 has a third inclined surface C411 opposite to and in contact with the second inclined surface C313. The side of the intermediate transmission plate C41 also has a rectangular portion C412 embedded in the "L"-shaped bending portion C312 area. The front portion of the intermediate transmission plate C41 is also provided with a fourth inclined surface C413 spaced opposite to the first inclined surface C311 of the first shoveling plate C31; the second shoveling plate C32 and the third shoveling plate C33 respectively have a fan-shaped portion C321 having a shape equivalent to the bending portion 12 of the foam 1 and a tail handle portion C322 extending from the rear of the fan-shaped portion into between the first inclined surface C311 and the fourth inclined surface C413, and the end portion of the tail handle portion C322 contacts the rectangular portion C412 of the intermediate transmission plate C41; the second cylinder C22 and the third cylinder C23 are respectively connected to and drive the intermediate transmission plate C41 on their respective sides;

[0054] When performing the edge scraping action, the first cylinder C21 first drives the first scraping plate C31 to move forward, and the first scraping plate C31 first bends the middle main body part of the extension part 31 of the second conductive cloth 3 and attaches it to the edge of the main body part 11 of the foam 1; while the first scraping plate C31 is pushed forward, the second inclined surfaces C313 on both sides thereof drive the middle transmission plate C41 to move forward as well, and then simultaneously drive the second scraping plates C32 and the third scraping plates C33 on both sides to move forward as well. When the second scraping plates C32 and the third scraping plates C33 just move to the raised part of the second conductive cloth 3, the second cylinder C22 and the third cylinder C23 drive the middle transmission plate C41 on their respective sides respectively, and the rectangular part C412 of the middle transmission plate C41 exerts a driving force on the tail ends of the second scraping plates C32 and the third scraping plates C33, and the first scraping plates C41 exert a driving force on the tail ends of the second scraping plates C32 and the third scraping plates C33. Under the limiting action of the first inclined surfaces C311 on both sides of the plate C31, the second shovel plate C32 and the third shovel plate C33 move obliquely forward along the first inclined surfaces C311 respectively, so that the fan-shaped parts C321 of the second shovel plates C32 and the third shovel plates C33 fold the second conductive cloth extension part located at the curved part 12 of the foam 1 and attach it to the curved part 12 of the foam 1, thereby completing the folding and wrapping operation of the second conductive cloth 3; then, the second cylinder C22 and the third cylinder C23 are reset, and the intermediate transmission plate C41 is pulled back, and then, the first cylinder C21 drives the first shovel plate C31 to retreat, and while the first shovel plate C31 retreats, it uses the action of the first inclined surface C311 to drive the second shovel plate C32 and the third shovel plate C33 to retreat until they are reset; such reciprocating action is performed to perform the flanging and wrapping operation;

[0055] In the above-mentioned wrapping jig, side limiting plates C42 and upper limiting plates C43 are respectively installed on the outside and top of the intermediate transmission plate C41, the second shovel plate C32 and the third shovel plate C33, and strip limiting holes C414 are respectively opened on the intermediate transmission plate C41 and the upper limiting plates C43. Limiting columns passing through the strip limiting holes are respectively provided on the two cylinder seats C4, and a transition inclined surface C421 and a step limiting surface C422 are also provided at the front end of the side limiting plate C42; the side limiting plate C42 and the upper limiting plate C43 are used to limit the movement of the intermediate transmission plate C41, the second shovel plate C32 and the third shovel plate C33. At the same time, a transition inclined surface C421 and a step limiting surface C422 are provided at the front end of the side limiting plate C42 to provide space for the oblique movement of the second shovel plate C32 and the third shovel plate C33 and facilitate the resetting of the two.

[0056] Recombination Fig.12As shown, in the above positioning and wrapping jig, a vertical guide column C5 is placed on both sides of the foam template C1, and a heating block C51 is installed between the vertical guide columns C5. The lower surface of the heating block C51 is formed with a protruding strip C511 with the same shape as the conductive rubber strip 4; when the conductive rubber strip 4 and the surface PET protective film 41 are attached to the extension part 31 of the second conductive cloth 3, the conductive rubber strip 4 and the surface PET protective film 41 above it are further attached by the heating block C51 to ensure tight bonding. In this embodiment, the driving mechanism of the heating block C51 can be driven by a cylinder lift, which is omitted in the figure.

[0057] In the above positioning and wrapping jig, a plurality of concave notches C102 intersecting with the foam positioning grooves are provided on the foam template C1 and at the outer edge of the foam positioning grooves C101; the concave notches C102 can be used to facilitate taking the wrapped foam out of the positioning grooves.

[0058] The present invention adopts the above-mentioned structure and production process, jig, double-layer conductive cloth structure and special shape of foam, and sets a spacer at the bending part of the conductive cloth wrapping to avoid wrinkles of the conductive cloth, so that the conductive cloth wrapped foam component can be suitable for the use requirements of specific products, thereby meeting market needs; the production process of the product is simplified as much as possible compared with its special shape, which is conducive to improving production efficiency. At the same time, the jig is used for step-by-step assembly and wrapping, and the product wrapping positioning is accurate and high in precision, which can ensure the quality stability of the product.

[0059] It is to be understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present invention, but the present invention is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A special-shaped double-layer conductive cloth wrapped foam component, characterized in that: The conductive cloth wrapped foam component comprises a foam, which has a main body in the shape of an elongated strip and a curved part which is integrally formed with the main body and is respectively located at two ends of the main body, the inner corners of the curved part and the main body are in the shape of an arc chamfer, and a concave part is provided at the outer corners of the curved part and the main body; the upper and lower surfaces of the foam and the outer side surface of the main body and the end surface of the curved part are wrapped and covered with a first conductive cloth; the outer surface of the first conductive cloth on the lower surface of the foam is also compounded with a layer of second conductive cloth, the second conductive cloth main body has a shape equivalent to that of the lower surface of the foam, and the inner edge of the second conductive cloth extends to form an extension part which is bent toward the upper surface along the inner side of the foam and wraps and covers the inner edge of the upper surface of the foam, and the parts of the two ends of the extension part which are located inside the curved part are provided with a plurality of spacers; a conductive rubber strip having a shape equivalent to that of the second conductive cloth at the edge is attached to the inner edge of the upper surface of the foam and the surface of the extension part of the second conductive cloth, and a layer of PET protective film is also attached to the outer surface of the conductive rubber strip; a bottom layer of PET silicone protective film is also compounded on the lower surface of the foam and the outer surface of the second conductive cloth.

2. The special-shaped double-layer conductive cloth wrapped foam component according to claim 1, characterized in that: The bottom PET silicone protective film also covers the inner area of ​​the foam bending part, and the inner surface of the bottom PET silicone protective film is also compounded with a PET release film.

3. The production process of the special-shaped double-layer conductive cloth wrapped foam component as claimed in claim 1, the production process comprising the production steps of producing the first conductive cloth wrapped foam component, the second conductive cloth component, the conductive adhesive component, the surface PET protective film component and the bottom PET silicone protective film component respectively by a flat knife die cutting process; Features: in, The production process of the foam and first conductive cloth wrapped component is as follows: firstly, a layer of the first conductive cloth tape is wrapped around the outer surface of the foam material strip, so that the foam material strip and the first conductive cloth tape are just wrapped and fitted, and then, the foam material strip wrapped with the first conductive cloth is die-cut to form a first conductive cloth wrapped foam component, wherein the foam of the first conductive cloth wrapped foam component has a main body and a curved part, and the upper and lower surfaces of the foam, the outer side surface of the main body, and the end surface of the curved part are wrapped and covered with the first conductive cloth, and the inner side surface of the main body and the inner side surface, outer side surface, and concave part of the curved part are directly exposed; The second conductive cloth assembly comprises a first release paper, a second conductive cloth and a first release film in sequence, wherein the second conductive cloth body is of a shape equivalent to the lower surface of the foam, and the inner edge of the second conductive cloth extends to form an extension portion that is bent along the inner side of the foam toward the upper surface and wraps and covers the inner edge of the upper surface of the foam, and a plurality of spacers are provided at the parts of the two ends of the extension portion located inside the bending portion, and two crease lines are formed on the extension portion; The conductive adhesive assembly includes a second release paper, a conductive adhesive strip and a second release film in sequence, and the shape of the conductive adhesive strip is equivalent to the shape of the edge of the extended portion of the second conductive cloth; The bottom PET silicone protective film assembly includes a PET acrylic protective film, a bottom PET silicone protective film, a PET release film and a third release paper in sequence; wherein the shape of the bottom PET silicone protective film is equivalent to the spatial shape of the inner side of the foam and its curved part along the length direction; the shape of the PET release film is equivalent to the shape of the spatial area inside the foam; Their assembly steps are as follows: Step a: first peel off the first release paper in the second conductive cloth component and position it on the first jig, and then position the foam component wrapped with the first conductive cloth on the second jig corresponding to the first jig, and then combine the second jig with the first jig to make the second conductive cloth and the foam component stick together and then demold, at this time, the second conductive cloth is attached to the surface of the first conductive cloth on one side of the foam component, and the extension part of the second conductive cloth protrudes from the inner edge of the foam; then peel off the first release film on the second conductive cloth component; Step b: Position the second conductive cloth foam component in a positioning and wrapping jig, the positioning and wrapping jig having a foam positioning groove having a shape similar to that of the foam. When the foam component is placed, the extension of the second conductive cloth is blocked by the side wall of the foam positioning groove and folded and lifted toward the inner wall of the foam, and then the lifted part is folded toward the upper surface of the foam by the shovel of the positioning and wrapping jig and pasted to the edge of the first conductive cloth compounded on the upper surface of the foam; Step c: sticking a conductive adhesive strip to the inner edge of the upper surface of the foam to cover the extended portion of the second conductive cloth, and compounding a surface layer of PET protective film on the surface of the conductive adhesive strip; Step d: Take the foam conductive cloth conductive adhesive assembly out of the positioning and wrapping jig, and adhere the bottom PET silicone protective film to the lower surface of the foam.

4. The production process of the special-shaped double-layer conductive cloth wrapped foam component according to claim 3, characterized in that: The first jig has a conductive cloth positioning concave surface corresponding to the outer contour of the second conductive cloth and is provided with a positioning hole. Correspondingly, the second jig has a foam positioning concave surface whose position corresponds to the conductive cloth positioning concave surface of the first jig and whose shape matches the shape of the foam, and the depth of the foam positioning concave surface is less than the thickness of the foam, and the second jig is provided with a positioning column corresponding to the positioning hole on the first jig; the second conductive cloth and the foam are positioned respectively by the first jig and the second jig, and then the second conductive cloth and the foam are quickly bonded to each other by alignment and mold closing.

5. A positioning and wrapping jig for wrapping a special-shaped double-layer conductive cloth with a foam component, characterized in that: The positioning and wrapping jig includes a mounting base plate, a foam template is mounted on the mounting base plate, a foam positioning groove corresponding to the shape of the foam is opened on the foam template, a first shovel plate, a second shovel plate and a third shovel plate in contact with the upper surface of the foam template are arranged on the upper surface of the foam template and the upper side of the foam positioning groove, and a first cylinder, a second cylinder and a third cylinder corresponding to and driving the first shovel plate, the second shovel plate and the third shovel plate are respectively arranged on the mounting base plate; the first cylinder directly drives the first shovel plate; the second cylinder and the third cylinder indirectly drive the second shovel plate and the third shovel plate respectively; the second shovel plate and the second cylinder, the third shovel plate and the third cylinder are respectively arranged on two cylinder seats flush with the foam template; wherein, the first shovel plate is respectively provided with a first inclined surface facing backward at the two corners of the tail of the first shovel plate, and the tail of the first shovel plate The edge is also provided with an "L"-shaped bending portion on both sides, and the outer end of the "L"-shaped bending portion is provided with a second inclined surface facing forward; an intermediate transmission plate is respectively provided on the two cylinder seats and on the rear sides of the two ends of the tail of the first shovel plate, and the intermediate transmission plate has a third inclined surface opposite to and in contact with the second inclined surface, and the side of the intermediate transmission plate also has a rectangular portion embedded in the "L"-shaped bending portion area, and the front part of the intermediate transmission plate is also provided with a fourth inclined surface opposite to the first inclined surface of the first shovel plate; the second shovel plate and the third shovel plate respectively have a fan-shaped portion corresponding to the shape of the foam bending portion and a tail handle portion extending from the rear of the fan-shaped portion into between the first and fourth inclined surfaces, and the terminal end of the tail handle portion is in contact with the rectangular portion of the intermediate transmission plate; the second cylinder and the third cylinder are respectively connected to and drive the intermediate transmission plate on their side.

6. The positioning and wrapping jig for wrapping a special-shaped double-layer conductive cloth foam component according to claim 5, characterized in that: Side limit plates and upper limit plates are respectively installed on the outside and top of the intermediate transmission plate, the second shovel plate and the third shovel plate. Strip limit holes are respectively opened on the intermediate transmission plate and the upper limit plate. Limit columns passing through the strip limit holes are respectively provided on the two cylinder seats. A transition inclined surface and a step limit surface are also provided at the front end of the side limit plate.

7. The positioning and wrapping jig for wrapping a special-shaped double-layer conductive cloth foam component according to claim 5, characterized in that: A vertical guide column is respectively arranged on both sides of the foam template, a heating pressing block is installed between the vertical guide columns, and a protruding pressing strip having a shape equivalent to that of the conductive rubber strip is formed on the lower surface of the heating pressing block.

8. The positioning and wrapping jig for wrapping a special-shaped double-layer conductive cloth foam component according to claim 5, characterized in that: A plurality of concave notch portions intersecting with the foam positioning groove are arranged on the foam template and at the outer edge of the foam positioning groove.

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