Double-sided heating equipment for film drawing machine

Abstract

The invention relates to the field of film drawing machines, and particularly discloses double-sided heating equipment for a film drawing machine, the double-sided heating equipment comprises a film drawing mechanism and a feeding mechanism, the feeding mechanism comprises a heating rack and a film supporting roller, a transverse guide rail is mounted on the side, close to the film drawing mechanism, of the side surface of the heating rack, and a transverse sliding groove is formed in the side surface of the transverse guide rail; two heating mechanisms are installed in the transverse sliding groove, each heating mechanism comprises a longitudinal guide rail and a moving guide frame, a longitudinal moving motor is installed at the position, located at one side end of the longitudinal guide rail, of one end of the positive and negative tooth lead screw, two heating guide plates are installed in the longitudinal guide rail, and heating wires are installed on the opposite faces of the two heating guide plates. The two sets of heating guide plates in the heating mechanism heat the face of the membrane at the same time, so that the membrane is evenly heated and softened, the temperature control system monitors and adjusts the heating temperature in real time, it is ensured that the temperatures of the two faces of the membrane are consistent, and the heated membrane is irregularly stretched through the stretching mechanism to form the needed sector shape.

Description

Technical Field

[0001] The invention relates to the field of film drawing machines, in particular to a double-sided heating device for film drawing machines. Background Art

[0002] Laminated glass is widely used in automobiles, construction and other fields due to its excellent impact resistance and safety. In the production process of laminated glass, the stretching of the diaphragm is one of the key links, especially for laminated glass that requires irregular shapes such as automobile windshields. At present, the diaphragm stretching technology mainly stretches the diaphragm after heating and softening it to achieve the extension and thickness adjustment of the diaphragm.

[0003] However, traditional diaphragm heating equipment usually adopts a single-sided heating method, that is, only one side of the diaphragm is heated. For the stretching of irregular-shaped diaphragms (such as fan-shaped), single-sided heating will lead to inconsistent temperatures on both sides of the diaphragm. After stretching, the diaphragm will produce wrinkles due to uneven cooling and shrinkage. Summary of the Invention

[0004] In view of the existing problems, the present invention provides a double-sided heating device for a film drawing machine, which can effectively solve the problems raised in the background technology when used in combination.

[0005] In order to solve the above problems, the present invention adopts the following technical solutions: A double-sided heating device for a film drawing machine includes a film drawing mechanism and a feeding mechanism, the feeding mechanism includes: a heating frame, a film support roller, the side surface of the heating frame is located on the side close to the film drawing mechanism and is installed with a transverse guide rail, the side surface of the transverse guide rail is provided with a transverse slide groove, two heating mechanisms are installed inside the transverse slide groove, the heating mechanism includes: a longitudinal guide rail, a movable guide frame, the longitudinal guide rail is installed with positive and negative screw rods, one end of the positive and negative screw rods is located on one side end of the longitudinal guide rail and is installed with a longitudinal moving motor, two heating guide plates are installed inside the longitudinal guide rail, heating wires are installed on opposite surfaces of the two heating guide plates, one end of the movable guide frame is located inside the transverse slide groove and is installed with a sliding guide block, the transverse slide groove is installed with a transmission screw rod on the inner side of the corresponding sliding guide block, and one end of the transmission screw rod is located on the side surface of the transverse guide rail and is installed with a transverse moving motor.

[0006] As a further solution of the present invention: the film drawing mechanism includes: a forming cone roller, a first active roller, and a second active roller. The second active roller is located below one end of the side close to the heating frame and is provided with a tensioning roller.

[0007] As a further solution of the present invention: a driving mechanism is installed on the side surface of the stretching frame at the position corresponding to the transmission shaft of the forming tapered roller, the first active roller and the second active roller, and the stretching frame is installed on the outer ends of the forming tapered roller, the first active roller and the second active roller.

[0008] As a further solution of the present invention: a membrane is provided inside the film-drawing mechanism and the feeding mechanism, and an auxiliary roller is installed on the inner side of the stretching frame between the forming cone roller and the first active roller.

[0009] As a further solution of the present invention: the movable guide frame is an L-shaped component, the sliding guide block is engaged and movably connected with the transmission screw, and the two heating guide plates are engaged and rotatably connected with the positive and negative screws.

[0010] As a further solution of the present invention: the longitudinal moving motor is fixedly connected to the forward and reverse screw rods.

[0011] As a further solution of the present invention: the heating temperature range of the heating wire inside the heating guide plate is 80° C. to 120° C., and the heating mechanism is externally connected to a temperature control system.

[0012] As a further solution of the present invention: the second central angle corresponding to the arc length formed by the diaphragm laminating to the first active roller is greater than or equal to 90°, the outer diameters of the first active roller and the second active roller are both greater than the outer diameter of the auxiliary roller, and on a cross section perpendicular to the axial direction of the second active roller, the first central angle corresponding to the arc length formed by the diaphragm laminating to the second active roller is greater than or equal to 90°, on a cross section perpendicular to the axial direction of the first active roller.

[0013] As a further solution of the present invention: the linear speed of the second active roller is the same as the linear speed of the first active roller, the diameter of the first active roller is 500-1200 mm, and the diameter of the second active roller is 500-1200 mm.

[0014] As a further solution of the present invention: the vertical distance from the axis of the tensioning roller to the transition section is less than or equal to twice the diameter of the first active roller and / or less than or equal to twice the diameter of the second active roller, and the diaphragm is provided with a transition section between the first active roller and the second active roller and at a portion tangent to the first active roller and the second active roller respectively.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The diaphragm is sent into the heating area through the diaphragm support device. The two sets of heating guides inside the heating mechanism heat the surface of the diaphragm at the same time, so that the diaphragm is evenly heated and softened. The temperature control system monitors and adjusts the heating temperature in real time to ensure that the temperature on both sides of the diaphragm is consistent. The heated diaphragm is irregularly stretched by the stretching mechanism to form the required fan shape.

[0016] 2. Driven by the transverse moving motor, the two heating mechanisms are synchronously controlled to move closer to or farther away from each other, which is convenient for placing the diaphragm. The two heating guide plates inside the two heating mechanisms are adjusted as a whole by driving the longitudinal moving motor to rotate the internal positive and negative screws to move closer to or farther away from each other synchronously inside the longitudinal guide rail, thereby controlling the distance from the heat source to the diaphragm and controlling the heating effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural diagram of a double-sided heating device for a film stretching machine; Figure 2 This is a structural diagram of a film-drawing mechanism in a double-sided heating device for a film-drawing machine; Figure 3 This is a structural diagram of a feeding mechanism in a double-sided heating device for a film drawing machine; Figure 4 This is a schematic diagram of the structure of a heating mechanism in a double-sided heating device for a film drawing machine; Figure 5 This is a partial structural diagram of a double-sided heating device for a film stretching machine; Figure 6 This is a partially enlarged schematic diagram of a double-sided heating device for a film stretching machine.

[0018] In the figure: 1. Diaphragm; 2. Forming cone roller; 3. First active roller; 4. Second active roller; 5. Stretching frame; 6. Heating frame; 7. Diaphragm support roller; 8. Transverse guide rail; 9. Tensioning roller; 10. Auxiliary roller; 11. Driving mechanism; 12. Transition section; 801. Transverse slide; 802. Transverse moving motor; 803. Heating mechanism; 804. Longitudinal guide rail; 805. Longitudinal moving motor; 806. Forward and reverse screw rod; 807. Moving guide frame; 808. Sliding guide block; 809. Heating guide plate; 810. Heating wire. DETAILED DESCRIPTION

[0019] The present invention is further described below in conjunction with specific inventions, and the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0020] In the description of this specification, the reference terms "this embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in combination with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example, and the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0021] like Figure 1-6 As shown, this embodiment provides a double-sided heating device for a film drawing machine, including a film drawing mechanism and a feeding mechanism, the feeding mechanism including: a heating frame 6, a film support roller 7, a side surface of the heating frame 6 is located on the side close to the film drawing mechanism and is installed with a transverse guide rail 8, a side surface of the transverse guide rail 8 is provided with a transverse slide 801, two heating mechanisms 803 are installed inside the transverse slide 801, the heating mechanism 803 includes: a longitudinal guide rail 804, a movable guide frame 807, a forward and reverse screw rod 806 is installed inside the longitudinal guide rail 804, and the forward and reverse screw rod 80 One end of 6 is located at one side end of the longitudinal guide rail 804 and is equipped with a longitudinal moving motor 805, which is fixedly connected to the positive and negative threaded rods 806. Two heating guide plates 809 are installed inside the longitudinal guide rail 804. Both heating guide plates 809 are engaged and rotated with the positive and negative threaded rods 806. The movable guide frame 807 is an L-shaped component. The opposite surfaces of the two heating guide plates 809 are equipped with heating wires 810. The heating temperature range of the heating wires 810 inside the heating guide plates 809 is 80℃~120℃, and the heating mechanism 803 is externally connected to the temperature control system. The temperature control system adopts PID control algorithm, and the temperature control accuracy is ±1°C. One end of the movable guide frame 807 is located inside the horizontal slide 801 and is equipped with a sliding guide block 808. The inside of the horizontal slide 801 corresponds to the inner side of the sliding guide block 808 and is equipped with a transmission screw. The sliding guide block 808 is engaged and movably connected with the transmission screw. One end of the transmission screw is located on the side surface of the horizontal guide rail 8 and is equipped with a horizontal moving motor 802. The transmission screw adopts a positive and negative thread screw, which can control and move the sliding guide block 808 at the end of the guide frame 807 to engage and rotate, so as to By adjusting the movable guide frame 807 to move as a whole inside the horizontal slide groove 801, the two heating mechanisms 803 can be synchronously controlled to move closer to or farther away from each other under the drive of the horizontal moving motor 802. After the two heating mechanisms 803 are controlled to dock as a whole, the two heating guide plates 809 inside the two heating mechanisms 803 can be adjusted as a whole to synchronously move closer to or farther away from each other inside the longitudinal guide rail 804 by driving the longitudinal moving motor 805 to control the internal forward and reverse screw rods 806 to rotate, thereby controlling the heating distance of the heat source.

[0022] like Figure 2-6 As shown, in this embodiment, the film drawing mechanism includes: a forming cone roller 2, a first active roller 3, and a second active roller 4. The diameter of the first active roller 3 is 500-1200 mm, the diameter of the second active roller 4 is 500-1200 mm, the linear speed of the second active roller 4 is the same as the linear speed of the first active roller 3, and the second active roller 4 is located below a side end close to the heating frame 6. A tensioning roller 9 is provided. The outer ends of the forming cone roller 2, the first active roller 3, and the second active roller 4 are installed with a stretching frame 5. The side surface of the stretching frame 5 corresponds to the position of the transmission shaft of the forming cone roller 2, the first active roller 3, and the second active roller 4. A driving mechanism 11 is installed, an auxiliary roller 10 is installed on the inner side of the stretching frame 5 between the forming cone roller 2 and the first active roller 3, a membrane 1 is arranged inside the film drawing mechanism and the feeding mechanism, and a transition section 12 is provided between the first active roller 3 and the second active roller 4 and at the part of the membrane 1 that is tangent to the first active roller 3 and the second active roller 4 respectively. The vertical distance from the axis of the tensioning roller 9 to the transition section is less than or equal to twice the diameter of the first active roller 3 and / or less than or equal to twice the diameter of the second active roller 4. On the cross section perpendicular to the axial direction of the second active roller 4, the arc length formed by the membrane 1 fitting the second active roller 4 is relatively large. The first central angle of the corresponding circle is greater than or equal to 90°. On the cross section perpendicular to the axis direction of the first active roller 3, the second central angle corresponding to the arc length formed by the diaphragm 1 fitting the first active roller 3 is greater than or equal to 90°. The outer diameters of the first active roller 3 and the second active roller 4 are both greater than the outer diameter of the auxiliary roller 10. On the cross section perpendicular to the axis direction of the second active roller 4, the first central angle α1 corresponding to the arc length formed by the diaphragm 1 fitting the second active roller 4 is greater than or equal to 90°. Wherein, under the premise of ensuring that the diaphragm 1 can sequentially surround the second active roller 4 and the first active roller 3, the arc length formed by the diaphragm 1 fitting the second active roller 4 is greater than or equal to 90°. The larger the first central angle α1 corresponding to the arc length, that is, the larger the area of ​​the second active roller 4 that can be covered by the surface of the diaphragm 1, the higher the utilization rate of the second active roller 4. In this way, when the diaphragm 1 is being pulled and moved, the rotation speed of the second active roller 4 remains unchanged, which is equivalent to extending the contact time between the surface of the diaphragm 1 and the second active roller 4, thereby achieving energy saving, or maintaining the heating power unchanged and increasing the pulling speed of the diaphragm 1 to improve production efficiency; similarly, the larger the first central angle α2 corresponding to the arc length formed by the diaphragm 1 fitting the first active roller 3, the purpose of improving production efficiency is also achieved.

[0023] In certain specific embodiments, such as Figure 1As shown, a forming conical roller 2 is provided on the film drawing mechanism, and the forming conical roller 2 is located on one side of the first active roller 3 and the second active roller 4. On a cross section perpendicular to the axial direction of the forming conical roller 2, a third central angle α3 corresponding to the arc length formed by the film sheet 1 being attached to the forming conical roller 2 is greater than or equal to 90°. In some further embodiments, a third central angle α3 corresponding to the arc length formed by the film sheet 1 being attached to the forming conical roller 2 is greater than or equal to 180°, wherein the surface of the film sheet 1 is attached to the forming conical roller 2. Since the diameters at both ends of the forming conical roller 2 are different, the film sheet 1 will be stretched to form a fan shape. In addition, in some embodiments, the forming conical roller 2 can be a fixed conical roller, that is, its taper is fixed and can be suitable for stretching a film sheet 1 of a single size. In some embodiments, the forming conical roller 2 can also have a variable taper. For example, a conical roller assembly for forming a film drawing machine with publication number CN104890224B provides a forming conical roller 2 with a variable taper.

[0024] In some embodiments, the vertical distance from the axis of the tensioning roller 9 to the transition section 12 is less than or equal to twice the diameter D1 of the second active roller 4 and / or less than or equal to twice the diameter D2 of the first active roller 3, wherein, in the embodiment Figure 6 In the illustrated embodiment, the tensioning roller 9 is close to the second active roller 4 and connected to the heating frame 6, and the vertical distance K1 from the axis of the tensioning roller 9 on the side close to the second active roller 4 to the transition section 12 is less than 1.5 times the diameter D1 of the second active roller 4, that is, K1≤1.5D1; the auxiliary roller 10 is close to the first active roller 3 and connected to the heating frame 6, and the vertical distance K2 from the axis of the auxiliary roller 10 on the side of the first active roller 3 to the transition section 12 is less than one times the diameter D2 of the first active roller 3, that is, K2≤D2. In addition, in some embodiments, the auxiliary roller 10 can also be an auxiliary heating roller. Further, the tensioning roller 9 can also be driven by a driving device to achieve independent rotation, thereby improving the smoothness of the transmission of the diaphragm 1.

[0025] The film stretching machine of the present invention can uniformly heat the two surfaces of the film 1 to soften the film 1 by using a double-sided heating device. Compared with a single-sided heating device, double-sided heating can heat and soften the film at a relatively lower temperature to avoid excessive heating temperature causing the local area of ​​the film 1 in contact with the heating roller to be affected by high temperature and cause optical distortion.

[0026] At the same time, for the diaphragm 1 that eventually forms a fan shape, double-sided heating can ensure that the temperature on both sides of the diaphragm 1 is consistent, so that during the cooling process of the diaphragm 1 after being stretched and formed, the two sides of the diaphragm 1 can be cooled at a relatively consistent temperature drop rate, thereby avoiding the occurrence of wrinkles.

[0027] The above are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent transformations made using the contents of the present invention's description and drawings, or directly or indirectly applied in related technical fields, are also included in the patent protection scope of the present invention.

[0028] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0029] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0030] The above is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A double-sided heating device for a film drawing machine, comprising a film drawing mechanism and a feeding mechanism, characterized in that: The feeding mechanism comprises: a heating frame (6), a film support roller (7), a side surface of the heating frame (6) located near the film pulling mechanism is provided with a transverse guide rail (8), a side surface of the transverse guide rail (8) is provided with a transverse slide groove (801), two heating mechanisms (803) are installed inside the transverse slide groove (801), the heating mechanism (803) comprises: a longitudinal guide rail (804), a movable guide frame (807), a forward and reverse screw rod (806) is installed inside the longitudinal guide rail (804), one end of the forward and reverse screw rod (806) is located on the longitudinal guide rail A longitudinal moving motor (805) is installed at one side end of (804), two heating guide plates (809) are installed inside the longitudinal guide rail (804), and heating wires (810) are installed on opposite surfaces of the two heating guide plates (809). One end of the moving guide frame (807) is located inside the transverse slide groove (801) and is installed with a sliding guide block (808). A transmission screw is installed inside the transverse slide groove (801) corresponding to the inner side of the sliding guide block (808), and one end of the transmission screw is located on the side surface of the transverse guide rail (8) and is installed with a transverse moving motor (802).

2. A double-sided heating device for a film drawing machine according to claim 1, characterized in that: The film-drawing mechanism comprises: a forming tapered roller (2), a first active roller (3), and a second active roller (4); the second active roller (4) is provided with a tensioning roller (9) below one end of the second active roller (4) located close to the heating frame (6).

3. The double-sided heating device for a film drawing machine according to claim 2, characterized in that: A stretching frame (5) is installed at the outer ends of the forming cone roller (2), the first active roller (3), and the second active roller (4), and a driving mechanism (11) is installed on the side surface of the stretching frame (5) at a position corresponding to the transmission shaft of the forming cone roller (2), the first active roller (3), and the second active roller (4).

4. The double-sided heating device for a film drawing machine according to claim 3, characterized in that: An auxiliary roller (10) is installed between the forming cone roller (2) and the first active roller (3) on the inner side of the stretching frame (5), and a film (1) is provided inside the film drawing mechanism and the feeding mechanism.

5. The double-sided heating device for a film drawing machine according to claim 1, characterized in that: The two heating guide plates (809) are both engaged and rotatably connected with the forward and reverse threaded rods (806); the movable guide frame (807) is an L-shaped component; and the sliding guide block (808) is engaged and movably connected with the transmission threaded rod.

6. The double-sided heating device for a film drawing machine according to claim 1, characterized in that: The heating temperature range of the heating wire (810) inside the heating guide plate (809) is 80°C to 120°C, and the heating mechanism (803) is externally connected to a temperature control system.

7. The double-sided heating device for a film drawing machine according to claim 1, characterized in that: The longitudinal movement motor (805) is fixedly connected to the forward and reverse threaded rods (806).

8. The double-sided heating device for a film drawing machine according to claim 4, characterized in that: The diaphragm (1) is provided with a transition section (12) between the first active roller (3) and the second active roller (4) and at a portion tangent to the first active roller (3) and the second active roller (4), respectively. The vertical distance from the axis of the tensioning roller (9) to the transition section is less than or equal to twice the diameter of the first active roller (3) and / or less than or equal to twice the diameter of the second active roller (4).

9. The double-sided heating device for a film drawing machine according to claim 3, characterized in that: The diameter of the first active roller (3) is 500-1200 mm, the diameter of the second active roller (4) is 500-1200 mm, and the linear speed of the second active roller (4) is the same as the linear speed of the first active roller (3).

10. The double-sided heating device for a film drawing machine according to claim 4, characterized in that: On a cross section perpendicular to the axial direction of the second active roller (4), a first central angle corresponding to an arc length formed by the diaphragm (1) fitting the second active roller (4) is greater than or equal to 90°; on a cross section perpendicular to the axial direction of the first active roller (3), a second central angle corresponding to an arc length formed by the diaphragm (1) fitting the first active roller (3) is greater than or equal to 90°; and the outer diameters of the first active roller (3) and the second active roller (4) are both greater than the outer diameter of the auxiliary roller (10).

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