A substrate feeding device for laser film production

Abstract

This utility model discloses a substrate feeding device for laser film production, belonging to the field of laser film production technology. It includes a transmission support, a feeding transmission roller, a discharging transmission roller, a floating roller, and a floating support. A protective housing is provided at the bottom of the transmission support, and the floating support is floatingly connected to the protective housing. The protective housing contains an elastic pre-tightening component, a spring top plate, and a double-spring buffer component. The pre-tightening force of the elastic pre-tightening component is balanced with the supporting force of the double-spring buffer component and the gravity of the floating support. The floating roller applies initial tension to the film. When the film tension increases, the floating support moves upward, the pre-tightening spring stretches to provide a reverse pulling force, and the double spring stretches to buffer vibration. When the tension decreases, the pre-tightening spring contracts to push the floating support downward, the double spring compresses to provide support, and the guide block slides along the guide groove to ensure vertical movement, achieving stable tension adjustment. This solves the problem in the prior art where improper tension control easily leads to defects such as laser film substrate breakage or wrinkles.

Description

Technical fields: This utility model belongs to the field of laser film production technology, and more specifically relates to a substrate feeding device for laser film production. Background technology: Laser film is a special thin film material manufactured using computer dot matrix lithography, 3D true color holography, and multiple dynamic imaging technologies. Its principle is based on the optical effects of light absorption, transmission, reflection, interference, and diffraction, which enables the control and modulation of light. Specifically, when a laser irradiates the surface of the laser film, the film material absorbs some of the light energy, while the remaining light is transmitted through the film material. At the same time, some of the light is reflected back by the film material, forming specular reflection or scattering.

[0001] The substrates used in laser film production mainly include plastic films. During the manufacturing process, these substrates are further processed into laser films using computer-aided technologies such as dot matrix lithography, 3D holography, and multi-dynamic imaging. A feeding device is needed to guide and transport the substrate during laser film production. However, existing feeding devices may experience sudden acceleration or deceleration of the laser film during transport, necessitating tension control. Improper control can easily lead to excessive tension causing substrate breakage or insufficient tension causing wrinkles and other defects. Utility model content: To solve the above problems and overcome the shortcomings of the existing technology, this utility model provides a substrate feeding device for laser film production; The first technical problem to be solved is that the existing feeding device, due to improper tension control during use, is prone to causing defects such as breakage or wrinkles in the laser film substrate.

[0002] The specific technical solution of this utility model to solve the above-mentioned technical problems is as follows: The substrate feeding device for laser film production includes a transmission support, a feeding transmission roller, a discharging transmission roller, a floating roller, and a floating support. Located inside the transmission bracket, the feeding transmission roller and the discharging transmission roller are rotatably connected to the transmission bracket at both ends through bearing seats. A floating roller is provided at a position below and between the feeding transmission roller and the discharging transmission roller, and a floating bracket is rotatably connected to both ends of the floating roller through bearing seats. The bottom of the transmission bracket located below the floating bracket is provided with symmetrically arranged protective boxes. The lower part of the floating bracket extends into the protective boxes and is floatingly connected to the protective boxes. A connecting plate extends horizontally from the bottom of the floating bracket. The protective box has vertical guide grooves on both sides of its inner walls, and guide blocks are provided on both sides of the connecting plate. The guide blocks are embedded in the guide grooves and the two are fitted with a clearance. The protective box is provided with an elastic pre-tightening assembly, a spring top plate, and a double spring buffer assembly. The elastic pretensioning assembly includes a pretensioning spring, an upper spring retainer, and a lower spring retainer. The upper spring retainer is fixed to the inner wall of the top of the protective box, and the lower spring retainer is fixed to the upper end face of the bottom connecting plate of the floating bracket by bolts. The upper end of the pretensioning spring is sleeved on the positioning boss of the upper spring retainer, and the lower end is sleeved on the positioning boss of the lower spring retainer. The spring top plate is fixed to the lower end face of the bottom connecting plate of the floating bracket by bolts. The dual-spring buffer assembly includes a main buffer spring, a damping spring, and a spring positioning seat. The spring positioning seat is welded to the inner wall of the bottom of the protective box. The spring positioning seat is provided with a positioning groove. The lower ends of the main buffer spring and the damping spring are respectively embedded in the corresponding positioning grooves, and the upper ends are connected to the lower surface of the spring top plate. The elastic pretensioning assembly, floating support, and double spring buffer assembly are distributed sequentially along the vertical central axis of the protective box, and the axes of the pretensioning spring, main buffer spring, and damping spring are all parallel to the moving direction of the floating support.

[0003] Furthermore, the spring top plate is connected to the bottom of the floating bracket by four M8 bolts, the preload of the bolts is not less than 80N, and the flatness of the contact surface between the spring top plate and the floating bracket is not greater than 0.1mm.

[0004] Furthermore, the upper ends of both the main buffer spring and the damping spring are welded to the lower surface of the spring top plate.

[0005] Furthermore, the main buffer spring is located on the vertical central axis of the protective housing, and there are two damping springs symmetrically distributed about the main buffer spring as the axis of symmetry.

[0006] Furthermore, the positioning groove on the spring positioning seat has a depth of 5mm, and the inner contour of the positioning groove is adapted to the outer diameter of the main buffer spring and the damping spring with a gap of 0.3-0.5mm.

[0007] The beneficial effects of this utility model are: One advantage of this invention is the inclusion of a protective housing with a floating support connected to it. The protective housing contains an elastic pre-tightening assembly, a spring top plate, and a double-spring buffer assembly. The pre-tightening force of the elastic pre-tightening assembly is balanced with the supporting force of the double-spring buffer assembly and the gravity of the floating support. The floating roller applies initial tension to the film. When the film tension increases, the floating support moves upward, the pre-tightening spring stretches to provide a reverse pulling force, and the double springs stretch to buffer vibration. When the tension decreases, the pre-tightening spring contracts, pushing the floating support downward, the double springs compress to provide support, and the guide block slides along the guide groove to ensure vertical movement. This achieves stable tension adjustment and solves the problem in existing technologies where improper tension control can easily lead to defects such as breakage or wrinkles in the laser film substrate. Attached image description: Appendix Figure 1This is a three-dimensional structural diagram of the present invention; Appendix Figure 2 This is a front view structural diagram of the present invention; Appendix Figure 3 This is a schematic diagram of the protective box structure of this utility model; Appendix Figure 4 This is an appendix to the utility model Figure 3 Schematic diagram of partial structure A in the middle; Appendix Figure 5 This is a side sectional view of the present invention; in the attached drawing: 1. Transmission bracket; 2. Feed transmission roller; 3. Discharge transmission roller; 4. Floating roller; 5. Floating bracket; 51. Guide block; 52. Connecting plate; 6. Protective housing; 61. Guide groove; 7. Elastic pre-tightening assembly; 71. Pre-tightening spring; 72. Upper spring retainer; 73. Lower spring retainer; 8. Spring top plate; 9. Double spring buffer assembly; 91. Main buffer spring; 92. Damping spring; 93. Spring positioning seat; 94. Positioning groove. Detailed implementation method: In the description of this utility model, it should be understood that the terms "center," "upper," "lower," "left," "right," "rear," "lower left," "upper right," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this utility model. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0008] The specific embodiment of this utility model: The substrate feeding device for laser film production includes a transmission support 1, a feeding transmission roller 2, a discharging transmission roller 3, a floating roller 4, and a floating support 5. Located inside the transmission bracket 1, the feeding transmission roller 2 and the discharging transmission roller 3 are rotatably connected to the transmission bracket 1 at both ends through bearing seats. A floating roller 4 is provided below the feeding transmission roller 2 and the discharging transmission roller 3. A floating bracket 5 is rotatably connected to both ends of the floating roller 4 through bearing seats. The laser film substrate is fed after passing through the feeding transmission roller 2, the floating roller 4 and the discharging transmission roller 3 in sequence.

[0009] As a preferred embodiment of this utility model: Below the floating support 5, the bottom of the transmission support 1 is provided with symmetrically arranged protective boxes 6, which are fixed to the inside of the transmission support 1 by bolts; The lower part of the floating bracket 5 extends into the protective box 6 and is floatingly connected to the protective box 6. A connecting plate 52 extends horizontally from the bottom of the floating bracket 5 inside the protective box 6. The inner walls of both sides of the protective box 6 are provided with vertical guide grooves 61. The connecting plate 52 is provided with guide blocks 51 that are adapted to the guide grooves 61 on both sides near the guide grooves 61. The guide blocks 51 are embedded in the guide grooves 61 and the two are fitted with a gap, which restricts the floating bracket 5 to move only vertically. Preferably, the fit gap is 0.3-0.5mm. The protective housing 6 is equipped with an elastic pre-tightening assembly 7, a spring top plate 8, and a double spring buffer assembly 9. Preferably, the elastic pretensioning assembly 7 includes a pretensioning spring 71, an upper spring retainer 72, and a lower spring retainer 73. The upper spring retainer 72 is welded to the inner top wall of the protective housing 6, and the lower spring retainer 73 is fixed to the upper end face of the bottom connecting plate 52 of the floating bracket 5 by bolts. The upper spring retainer 72 and the lower spring retainer 73 are provided with positioning bosses on their end faces near the spring. The upper end of the pretensioning spring 71 is sleeved on the positioning boss of the upper spring retainer 72, and the lower end is sleeved on the positioning boss of the lower spring retainer 73. The spring top plate 8 is fixed to the lower end face of the bottom connecting plate 52 of the floating bracket 5 by bolts. Preferably, the spring top plate 8 is connected to the bottom of the floating bracket 5 by four M8 bolts. This rigid connection can ensure that the force transmission is not delayed and improve the buffer synchronization.

[0010] A double-spring buffer assembly 9 is provided below the spring top plate 8. The double-spring buffer assembly 9 includes a main buffer spring 91, a damping spring 92, and a spring positioning seat 93. The spring positioning seat 93 is welded to the inner wall of the bottom of the protective box 6. The spring positioning seat 93 is provided with a positioning groove 94. The lower ends of the main buffer spring 91 and the damping spring 92 are respectively embedded in the corresponding positioning grooves 94, and the upper ends are connected to the lower surface of the spring top plate 8. Preferably, the upper ends of the main buffer spring 91 and the damping spring 92 are welded to the lower surface of the spring top plate 8. The diameter of the weld ring at the weld is 2 mm larger than the outer diameter of the main buffer spring 91 and the damping spring 92, and the weld strength is not less than 200 MPa.

[0011] Furthermore, the main buffer spring 91 is located on the vertical central axis of the protective housing 6, and there are two damping springs 92 which are symmetrically distributed with the main buffer spring 91 as the axis of symmetry. The distance between the damping spring 92 and the main buffer spring 91 is 25-35mm.

[0012] Furthermore, the positioning groove 94 on the spring positioning seat 93 has a depth of 5mm, and the inner contour of the positioning groove 94 is adapted to the outer diameter of the main buffer spring 91 and the damping spring 92 with a gap of 0.3-0.5mm.

[0013] The elastic pretensioning component 7, the floating bracket 5, and the double spring buffer component 9 are distributed sequentially along the vertical central axis of the protective box 6, and the axes of the pretensioning spring 71, the main buffer spring 91, and the damping spring 92 are all parallel to the moving direction of the floating bracket 5.

[0014] It should be noted that this utility model is a substrate feeding device for laser film production. In specific operation... The pre-compression spring 71 is formed by the upper spring retainer 72 and the lower spring retainer 73, generating an upward elastic tension, which forces the floating bracket 5 to drive the floating roller 4 to press downward against the laser film substrate, forming initial tension; the lower ends of the main buffer spring 91 and the damping spring 92 are embedded in the positioning groove 94 of the spring positioning seat 93, and the upper ends are welded to the spring top plate 8. The initial pre-compression provides an upward support force, which is balanced with the tension of the pre-compression spring 71 and the gravity of the floating bracket 5, ensuring that the floating bracket 5 is stable in the initial position; the guide blocks 51 on both sides of the connecting plate 52 are embedded in the box guide groove 61, which restricts the floating bracket 5 to move only vertically, avoiding lateral displacement that would cause uneven force on the spring.

[0015] When the feed speed increases, the tension of the laser film substrate suddenly increases: the laser film substrate pulls the floating roller 4 to move upward, which drives the floating bracket 5 to move upward synchronously. The pre-tension spring 71 is further stretched, generating a reverse tension to buffer the sudden tension change. The spring top plate 8 moves upward with the floating bracket 5, and the main buffer spring 91 and the damping spring 92 are stretched. The main buffer spring 91 bears the main tensile force and suppresses large fluctuations. The damping spring 92 bears the remaining tensile force, absorbs high-frequency vibration, and avoids the vibration from being transmitted to the laser film substrate. The guide block 51 slides along the guide groove 61 to ensure that the floating bracket 5 moves vertically and the spring is always under axial force. When the feed speed slows down, the tension of the laser film substrate suddenly decreases: the tension of the laser film substrate on the floating roller 4 weakens, the elastic tension of the pre-tension spring 71 pushes the floating support 5 downward, the pre-tension spring 71 contracts, releasing the stored elastic potential energy, driving the floating roller 4 to apply downward pressure to compensate for insufficient tension, the spring top plate 8 moves downward with the floating support 5, and the main buffer spring 91 and damping spring 92 are compressed. The main buffer spring 91 provides support force, and the damping spring 92 suppresses rebound vibration through compression deformation. With this structure, through the coordinated response of the elastic pre-tension component 7 and the double spring buffer component 9, excessive tension can prevent the laser film substrate from breaking, or insufficient tension can prevent wrinkles.

[0016] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A substrate feeding device for laser film production, comprising a transmission support (1), a feeding transmission roller (2), a discharging transmission roller (3), a floating roller (4), and a floating support (5), located inside the transmission support (1), wherein the two ends of the feeding transmission roller (2) and the discharging transmission roller (3) are rotatably connected to the transmission support (1) via bearing seats, and a floating roller (4) is provided below the feeding transmission roller (2) and the discharging transmission roller (3), wherein the two ends of the floating roller (4) are rotatably connected to the floating support (5) via bearing seats; characterized in that: The transmission bracket (1) located below the floating bracket (5) has a symmetrically arranged protective box (6) at its bottom. The lower part of the floating bracket (5) extends into the protective box (6) and is floatingly connected to the protective box (6). The bottom of the floating bracket (5) has a horizontally extended connecting plate (52). The protective housing (6) has vertical guide grooves (61) on both inner walls, and guide blocks (51) are provided on both sides of the connecting plate (52). The guide blocks (51) are embedded in the guide grooves (61) with a clearance fit. The protective housing (6) is equipped with an elastic pre-tightening assembly (7), a spring top plate (8), and a double spring buffer assembly (9). The elastic pretensioning assembly (7) includes a pretensioning spring (71), an upper spring bracket (72), and a lower spring bracket (73). The upper spring bracket (72) is fixed to the inner wall of the top of the protective box (6). The lower spring bracket (73) is fixed to the upper end face of the bottom connecting plate (52) of the floating bracket (5) by bolts. The upper end of the pretensioning spring (71) is sleeved on the positioning boss of the upper spring bracket (72), and the lower end is sleeved on the positioning boss of the lower spring bracket (73). The spring top plate (8) is fixed to the lower end face of the bottom connecting plate (52) of the floating bracket (5) by bolts. The double spring buffer assembly (9) includes a main buffer spring (91), a damping spring (92) and a spring positioning seat (93). The spring positioning seat (93) is welded to the bottom inner wall of the protective box (6). The spring positioning seat (93) is provided with a positioning groove (94). The lower ends of the main buffer spring (91) and the damping spring (92) are respectively embedded in the corresponding positioning grooves (94), and the upper ends are connected to the lower surface of the spring top plate (8). The elastic pretensioning assembly (7), the floating bracket (5) and the double spring buffer assembly (9) are distributed sequentially along the vertical central axis of the protective box (6), and the axes of the pretensioning spring (71), the main buffer spring (91) and the damping spring (92) are all parallel to the moving direction of the floating bracket (5).

2. The substrate feeding device for laser film production according to claim 1, wherein The spring top plate (8) is connected to the bottom of the floating bracket (5) by four M8 bolts. The preload of the bolts is not less than 80N, and the flatness of the contact surface between the spring top plate (8) and the floating bracket (5) is not greater than 0.1mm.

3. The substrate feeding device for laser film production according to claim 1, wherein The upper ends of the main buffer spring (91) and the damping spring (92) are welded to the lower surface of the spring top plate (8).

4. The substrate feeding device for laser film production according to claim 3, wherein The main buffer spring (91) is located on the vertical central axis of the protective box (6), and there are two damping springs (92) that are symmetrically distributed with the main buffer spring (91) as the axis of symmetry.

5. The substrate feeding device for laser film production according to claim 1, wherein The positioning groove (94) on the spring positioning seat (93) has a depth of 5mm. The inner contour of the positioning groove (94) is adapted to the outer diameter of the main buffer spring (91) and the damping spring (92) with a gap of 0.3-0.5mm.

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