A fabric patching device for automatically folding and bonding fabric pieces to a plastic shell.

Abstract

This utility model discloses a fabric applicator for automatically folding and bonding fabric pieces to a plastic shell. It includes a frame, a work platform mounted on the frame, a fabric placement base mounted on the work platform, and a folding mechanism. The surface of the fabric placement base is a contoured surface adapted to the bonding surface of the plastic shell. The folding mechanism includes multiple reciprocating cylinders located around the outer perimeter of the fabric placement base, and a folding push block connected to the front end of the piston rod of each reciprocating cylinder. A fixed bracket is located directly above the fabric placement base, and a first pressing mechanism is mounted on the fixed bracket. A plastic shell positioning and loading fixture is located at the bottom of the first pressing mechanism, and a second pressing mechanism is movably mounted on the plastic shell positioning and loading fixture. The first pressing mechanism presses down the plastic shell to position and bond the fabric piece, then the folding mechanism folds the edge of the fabric piece, and finally the second pressing mechanism folds and bonds the edge of the fabric piece to the inner edge of the plastic shell.

Description

Technical Field

[0001] This disclosure relates to the field of fabric application technology for plastic shells, and more particularly to a fabric application device for automatically folding and bonding fabric pieces to plastic shells. Background Technology

[0002] Fabric is often applied to the outer casings of products for decorative, dustproof, and protective purposes, such as speaker casings, storage boxes, power bank casings, and phone cases. Applying fabric to the casings of these products, especially those with curved edges, requires folding the edges of the fabric to the inside of the casing edge. The process involves placing the fabric piece using a positioning fixture, then placing the product casing on top, manually folding and pre-fixing the fabric edges, and finally using a heated pressing device to heat-melt the adhesive film onto the casing. This process is labor-intensive, significantly impacting production efficiency and increasing labor costs. Therefore, it is necessary to optimize and improve the fabric application equipment to automate the folding process and further enhance automation. Utility Model Content

[0003] In view of this, this disclosure proposes a fabric patching device that automatically folds the fabric edge and bonds it to a plastic shell. By setting up a folding mechanism, the fabric edge is automatically folded, realizing a fabric patching device that integrates automatic fabric folding and pressing bonding.

[0004] The technical solution of this utility model is a fabric applicator for automatically folding and bonding fabric pieces to a plastic shell, comprising a frame, a work platform mounted on the frame, a fabric placement base mounted on the work platform, and a folding mechanism. The surface of the fabric placement base is a contoured surface adapted to the bonding surface of the plastic shell. The folding mechanism includes multiple reciprocating cylinders located around the outer perimeter of the fabric placement base and a folding push block connected to the front end of the piston rod of the reciprocating cylinders. A fixed bracket is located directly above the fabric placement base, and a first pressing mechanism is mounted on the fixed bracket. A plastic shell positioning and loading fixture is located at the bottom of the first pressing mechanism, and a second pressing mechanism is movably mounted on the plastic shell positioning and loading fixture.

[0005] Furthermore, the fixed bracket includes a support column located outside the fabric placement base and the folding mechanism, and an upper support plate is provided at the upper end of the support column.

[0006] Furthermore, the first pressing mechanism includes at least one first compact cylinder vertically downwardly disposed on the upper support plate, and a pressing bracket driven to move up and down by the piston rod of the first compact cylinder. The bottom of the pressing bracket is provided with a plastic shell positioning and loading fixture. The first compact cylinder is fixed on the upper support plate, and the upper support plate is provided with a first through hole corresponding to the piston rod of the first compact cylinder.

[0007] Furthermore, the pressing bracket includes an upper connecting plate and a lower connecting plate arranged parallel to each other, with a spacer connecting plate between the upper and lower connecting plates. The piston rod of the first compact cylinder is connected to the upper connecting plate. The bottom of the lower connecting plate is provided with a connecting post connecting to the plastic shell positioning and loading fixture. The second pressing mechanism includes at least one second compact cylinder arranged vertically downward on the lower connecting plate. A side pressing cover is driven to move up and down by the piston rod of the second compact cylinder. The side pressing cover is provided with a second through hole for the connecting post to pass through. The lower connecting plate is provided with a third through hole through which the piston rod of the second compact cylinder passes. The top surface of the side pressing cover is connected to the piston rod of the second compact cylinder. The edge of the side pressing cover is a contoured edge that is adapted to and pressed against the inner side of the edge of the plastic shell.

[0008] Furthermore, the fabric placement base, the folding push block, and the edge pressing cover are made of alloy material. The folding push block and the edge pressing cover are provided with mounting holes, and electric heating tubes are installed in the mounting holes.

[0009] Furthermore, a column guide rod is provided on each side of the upper surface of the upper connecting plate symmetrically along the center point of the upper connecting plate, and a fourth through hole is provided on the upper support plate through which the column guide rod passes, and a guide sleeve fitted on the column guide rod is fixed at the fourth through hole.

[0010] Furthermore, the upper surface edge of the work platform is provided with a protective side plate, which surrounds the front end of the work platform to form a loading and unloading window. A pair of safety light curtains are provided on the inner side of the left and right side walls of the loading and unloading window. The upper end of the protective side plate surrounds the upper support plate of the fixed bracket at a height position. Several evenly distributed heat dissipation holes are provided on the surface of the protective side plate.

[0011] Furthermore, the upper end of the protective side plate is provided with a top shell, the top shell including a top side plate connected along the upper end of the protective side plate, a top cover plate provided on the top of the top side plate, the top cover plate is provided with holes for the piston rod and column guide rod of the first compact cylinder to pass through, and the top side plate is provided with an industrial control screen and a temperature controller on the front side corresponding to the loading and unloading window.

[0012] The applicator disclosed in this utility model has the following beneficial effects: By setting a fabric placement base, a folding mechanism is formed by setting a repeating cylinder around the outer perimeter of the fabric placement base and connecting a folding push block to the piston rod of the repeating cylinder. The fabric with a pre-set adhesive film is placed on the fabric placement base, wherein the outline of the fabric is slightly larger than the edge of the fabric placement base. After the plastic shell positioning and loading fixture at the bottom of the first pressing mechanism is loaded with the plastic shell, it is pressed down to the upper surface of the fabric by the first pressing mechanism. At this time, the repeating cylinder of the folding mechanism pushes the folding push block to fold the edge of the fabric. Then, the edge pressing cover of the second pressing mechanism presses it to the inner edge of the curved surface of the plastic shell. The heating element heats the folding pusher and the edge pressing cover. The heat from the folding pusher is then transferred to the fabric placement base to melt the adhesive film on the fabric. The first and second pressing mechanisms then press and hold the fabric to achieve the application of the fabric to the surface of the plastic shell. This integrated fabric folding and pressing bonding device eliminates the need for manual folding, greatly reducing manual output and improving production efficiency. Attached Figure Description

[0013] The accompanying drawings, which are included in and form part of this specification, illustrate exemplary embodiments, features, and aspects of this disclosure together with the specification and serve to explain the principles of this disclosure.

[0014] Figure 1 A perspective view of the overall structure of the applicator provided in this embodiment of the utility model.

[0015] Figure 2 A schematic diagram of the assembly structure of the cloth placement base, folding mechanism, fixing bracket, first pressing mechanism, second pressing structure, and plastic shell positioning and loading fixture on the work platform provided in the embodiment of this utility model.

[0016] Figure 3 This is a schematic diagram of the edge pressure cover structure provided in an embodiment of the present utility model.

[0017] Figure 4 This is a schematic diagram of the fabric placement base and folding mechanism provided in an embodiment of the present utility model.

[0018] Figure 5 A cross-sectional view of the assembly structure of the first pressing mechanism, the second pressing mechanism, and the plastic shell positioning and loading fixture provided for embodiments of this utility model.

[0019] Figure 6 This is a schematic diagram of the plastic shell and fabric sheet structure of an embodiment of this utility model.

[0020] Figure 7 This is a schematic diagram of a transverse cross-section of the plastic shell and the fabric sheet being bonded together in an embodiment of this utility model.

[0021] Figure 8 for Figure 7 Enlarged schematic diagram of the structure at point A in the middle.

[0022] Figure 9 This is a longitudinal cross-sectional schematic diagram of the bonding of the plastic shell and the fabric sheet in an embodiment of the present invention.

[0023] Figure 10 for Figure 9 Enlarged schematic diagram of the structure at point B.

[0024] The reference numerals in the attached figures are explained as follows: 1. Frame; 2. Working platform; 3. Fabric placement base; 4. Folding mechanism; 41. Reciprocating cylinder; 42. Folding push block; 5. Fixed bracket; 51. Support column; 52. Upper support plate; 6. First pressing mechanism; 61. First compact cylinder; 62. Pressing bracket; 621. Upper connecting plate; 622. Lower connecting plate; 623. Spacing connecting plate; 63. Second compact cylinder; 64. Side pressing cover; 7. Plastic shell positioning and loading fixture; 71. Connecting column; 8. Column guide rod; 9. Protective side plate; 10. Safety light curtain; 11. Top shell; 12. Industrial control panel; 13. Temperature controller; 20. Electric heating tube; 100. Plastic shell; 200. Fabric piece. Detailed Implementation

[0025] The technical solutions in the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments of this disclosure, all other embodiments obtained by those skilled in the art without creative effort are also within the scope of protection of this disclosure.

[0026] Please refer to Figures 1 to 10 This embodiment provides a fabric patching device for automatically folding and bonding fabric pieces to a plastic shell. The plastic shell to be bonded is a speaker shell 100. The fabric patching device includes a frame 1, a working platform 2 on the frame 1, a fabric piece placement base 3 on the working platform 2, and a folding mechanism 4. The surface of the fabric piece placement base 3 is a contoured surface adapted to the bonding surface of the plastic shell 100. The folding mechanism 4 includes multiple reciprocating cylinders 41 located around the fabric piece placement base 3, and a folding push block 42 connected to the front end of the piston rod of the reciprocating cylinders 41. A fixed bracket 5 is provided directly above the fabric piece placement base 3. A first pressing mechanism 6 is provided on the fixed bracket 5. A plastic shell positioning and loading fixture 7 is provided at the bottom of the first pressing mechanism 6. A second pressing mechanism is movably sleeved on the plastic shell positioning and loading fixture 7.

[0027] Please refer to Figures 2 to 5Specifically, the fixed bracket 5 includes a support column 51 located outside the fabric placement base 3 and the folding mechanism 4, and an upper support plate 52 located at the upper end of the support column 51. The first pressing mechanism 6 includes at least one first compact cylinder 61 vertically downwardly mounted on the upper support plate 52, and a pressing bracket 62 driven to move up and down by the piston rod of the first compact cylinder 61. The bottom of the pressing bracket 62 is provided with a plastic shell positioning and loading fixture 7. The first compact cylinder 61 is fixed on the upper support plate 52, and the upper support plate 52 is provided with a first through hole corresponding to the piston rod of the first compact cylinder 61. The pressing bracket 62 includes an upper connecting plate 621 and a lower connecting plate 622 arranged parallel to each other. A spacer connecting plate 623 is provided between the upper connecting plate 621 and the lower connecting plate 622. The piston rod of the first compact cylinder 61 is connected to the upper connecting plate 621. The bottom of the lower connecting plate 622 is provided with a connecting post 71 to connect to the plastic shell positioning and loading fixture 7. The second pressing mechanism includes at least one second compact cylinder 63 arranged vertically downward on the lower connecting plate 622. A side pressing cover 64 is driven to move up and down by the piston rod of the second compact cylinder 63. The side pressing cover 64 is provided with a second through hole for the connecting post 71 to pass through. The lower connecting plate 622 is provided with a third through hole through which the piston rod of the second compact cylinder 63 passes. The top surface of the side pressing cover 64 is connected to the piston rod of the second compact cylinder 63. The edge of the side pressing cover 64 is a contoured edge that is adapted to fit and pressed against the inner side of the edge of the plastic shell 100.

[0028] In this embodiment, the fabric placement base 3, the folding edge push block 42, and the edge pressing cover 64 are made of alloy material. The folding edge push block 42 and the edge pressing cover 64 are both provided with mounting holes, and an electric heating tube 20 is provided in the mounting hole. The electric heating tube 20 is preferably a quartz infrared heating tube.

[0029] In this embodiment, preferably, a column guide rod 8 is provided on each side symmetrically along the center point of the upper connecting plate 621. The upper support plate 52 is provided with a fourth through hole through which the column guide rod 8 passes, and a guide sleeve fitted onto the column guide rod 8 is fixed at the fourth through hole. By setting the column guide rods 8 on the left and right sides of the upper connecting plate 621, the pressure of the first pressing structure can be made more stable by the column guide rods 8. The pressure of the first compact cylinder 61 at both ends and the middle of the plastic shell positioning and loading fixture 7 is balanced and stable, so that the surface of the plastic shell 100 and the cloth piece 200 are more completely adhered during the pressure.

[0030] Furthermore, a protective side plate 9 is provided along the edge of the upper surface of the working platform 2. The protective side plate 9 surrounds the front end of the working platform 2 as a loading and unloading window. A pair of safety light curtains 10 are provided on the inner side of the left and right side walls of the loading and unloading window. The upper end of the protective side plate 9 extends to the height of the upper support plate 52 of the fixed bracket 5. Several evenly distributed heat dissipation holes are provided on the surface of the protective side plate 9. By setting the protective side plate 9 to surround the outside, a safe working environment is formed. At the same time, by setting the safety light curtains 10, the first pressing mechanism 6 will not start pressing down when the safety light curtains 10 sense a signal, thus avoiding accidental pressing of the operator's hand.

[0031] Furthermore, a top housing 11 is provided at the upper end of the protective side plate 9. The top housing 11 includes a top side plate connected to the upper end of the protective side plate 9, and a top cover plate located at the top of the top side plate. The top cover plate has holes for the piston rod of the first compact cylinder 61 and the column guide rod 8 to pass through. An industrial control screen 12 and a temperature controller 13 are provided on the front side of the top side plate corresponding to the loading and unloading window. The industrial control screen 12 is provided on the front side of the top housing 11 to facilitate better control and display of the equipment's operating status and information, and to more conveniently set the heating temperature of the electric heating tube 20. In this embodiment, the speaker plastic shell is usually covered with fiber mesh. The fiber mesh is pre-applied with an adhesive film. By heating, the adhesive film can be melted. The molten fiber mesh is then bonded to the surface of the speaker plastic shell by the pressing and holding pressure of the first pressing mechanism 6 of the bonding equipment.

[0032] The specific working principle of the applicator in this embodiment is as follows: A fabric piece 200 with a pre-set adhesive film is placed on a fabric piece placement base 3, wherein the outer contour of the fabric piece 200 is slightly larger than the edge of the fabric piece placement base 3. After the plastic shell 100 is mounted on the plastic shell positioning and loading fixture 7 at the bottom of the first pressing mechanism 6, it is pressed down onto the upper surface of the fabric piece 200 by the first pressing mechanism 6. At this time, the folding edge mechanism 4 pushes the folding edge pusher 42 through the reciprocating cylinder 41 to fold the edge of the fabric piece 200. Then the folding edge pusher 42 retracts, and then the edge pressing cover 64 of the second pressing mechanism presses it against the inner side of the curved edge of the plastic shell 100, thereby achieving the folding and bonding of the edge of the fabric piece 200 with the edge of the plastic shell 100. Figure 8 At point A, the fabric piece along the side edge of the speaker's plastic shell along its length is folded and pasted at a 200° angle; as shown... Figure 10At point B, the fabric piece 200 is folded and pasted along the side edge of the speaker's plastic shell in the width direction. The heating element 20 heats the folding pusher 42 and the edge pressing cover 64. The heat from the folding pusher 42 is conducted to the fabric placement base 3, achieving heat melting of the adhesive film on the fabric piece 200. Through the pressure holding of the first pressing mechanism 6 and the second pressing mechanism, the fabric is pasted onto the surface of the plastic shell 100. This integrated fabric folding and pressing device eliminates the need for manual folding, significantly reducing manual output and improving production efficiency.

[0033] In this embodiment, the air pumps connected to the first compact cylinder 61, the second compact cylinder 63, and the double-acting cylinder 41 are connected to the air pumps via air pipes according to existing technology. They are equipped with solenoid valves and PLC controllers. The solenoid valves are located on the air pipes. The air pumps, solenoid valves, electric heating tubes 20, safety light curtains 10 are connected to the PLC controller, which is connected to the industrial control panel 12. The PLC controller is equipped with start buttons and emergency stop buttons. This is a mature existing technology, so it will not be described in detail here.

[0034] The parts not described in detail in this technical solution specification are obvious to those skilled in the art and can be supplemented and improved based on existing technical knowledge. At the same time, those skilled in the art should understand that the above embodiments are merely preferred embodiments of this utility model. For those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A fabric patching device for automatically folding and bonding fabric pieces to a plastic shell, characterized in that, The device includes a frame, a work platform mounted on the frame, a fabric placement base mounted on the work platform, and a folding mechanism. The surface of the fabric placement base is a contoured surface adapted to the bonding surface of the plastic shell. The folding mechanism includes multiple reciprocating cylinders located around the outer perimeter of the fabric placement base and a folding push block connected to the front end of the piston rod of the reciprocating cylinders. A fixed bracket is located directly above the fabric placement base, and a first pressing mechanism is mounted on the fixed bracket. A plastic shell positioning and loading fixture is located at the bottom of the first pressing mechanism, and a second pressing mechanism is movably mounted on the plastic shell positioning and loading fixture.

2. The fabric patching equipment for automatically folding and bonding fabric pieces to a plastic shell according to claim 1, characterized in that, The fixed bracket includes a support column located outside the fabric placement base and the folding mechanism, and an upper support plate is provided at the upper end of the support column.

3. The fabric patching equipment for automatically folding and bonding fabric pieces to a plastic shell according to claim 2, characterized in that, The first pressing mechanism includes at least one first compact cylinder vertically downwardly disposed on the upper support plate, and a pressing bracket driven to move up and down by the piston rod of the first compact cylinder. The bottom of the pressing bracket is provided with a plastic shell positioning and loading fixture. The first compact cylinder is fixed on the upper support plate, and the upper support plate is provided with a first through hole corresponding to the piston rod of the first compact cylinder.

4. The fabric patching equipment for automatically folding and bonding fabric pieces to a plastic shell according to claim 3, characterized in that, The pressing bracket includes an upper connecting plate and a lower connecting plate arranged parallel to each other, with a spacer connecting plate between the upper and lower connecting plates. The piston rod of the first compact cylinder is connected to the upper connecting plate. The bottom of the lower connecting plate is provided with a connecting post connecting to a plastic shell positioning and loading fixture. The second pressing mechanism includes at least one second compact cylinder arranged vertically downward on the lower connecting plate. A side pressing cover is driven to move up and down by the piston rod of the second compact cylinder. The side pressing cover is provided with a second through hole for the connecting post to pass through. The lower connecting plate is provided with a third through hole through which the piston rod of the second compact cylinder passes. The top surface of the side pressing cover is connected to the piston rod of the second compact cylinder. The edge of the side pressing cover is a contoured edge that is adapted to and pressed against the inner edge of the plastic shell.

5. The fabric patching equipment for automatically folding and bonding fabric pieces to a plastic shell according to claim 4, characterized in that, The fabric placement base, the folding push block, and the edge pressing cover are made of alloy material. The folding push block and the edge pressing cover are provided with mounting holes, and electric heating tubes are installed in the mounting holes.

6. The fabric patching equipment for automatically folding and bonding fabric pieces to a plastic shell according to claim 4, characterized in that, The upper surface of the upper connecting plate is provided with a column guide rod on each side symmetrically along the center point of the upper connecting plate. The upper support plate is provided with a fourth through hole through which the column guide rod passes, and a guide sleeve sleeved on the column guide rod is fixed at the fourth through hole.

7. The fabric patching equipment for automatically folding and bonding fabric pieces to a plastic shell according to claim 6, characterized in that, The upper surface of the work platform is provided with a protective side plate, which surrounds the front end of the work platform to form a loading and unloading window. A pair of safety light curtains are provided on the inner side of the left and right side walls of the loading and unloading window. The upper end of the protective side plate surrounds the upper support plate of the fixed bracket. Several evenly distributed heat dissipation holes are provided on the surface of the protective side plate.

8. The fabric patching equipment for automatically folding and bonding fabric pieces to a plastic shell according to claim 7, characterized in that, The upper end of the protective side plate is provided with a top shell, the top shell includes a top side plate connected along the upper end of the protective side plate, a top cover plate located on the top of the top side plate, and holes for the piston rod and column guide rod of the first compact cylinder to pass through on the top cover plate. The top side plate is provided with an industrial control screen and a temperature controller on the front side corresponding to the loading and unloading window.

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