Continuous bending die for flexible medium density fiberboard

Abstract

The utility model discloses a continuous bending die for a flexible medium density fiberboard, and relates to board bending equipment. The continuous bending die comprises a lower hot-pressing seat and two upper hot-pressing seats, hot-pressing cavities in one-to-one correspondence with the upper hot-pressing bases are formed in the lower hot-pressing bases, a first fixed heating part is fixedly arranged between every two adjacent hot-pressing cavities, flexible heating assemblies extending along the surfaces are laid in the hot-pressing cavities, and one ends of the flexible heating assemblies are flexibly connected with the fixed heating parts; the other end of the flexible heating assembly is installed on the surface of the lower hot pressing base in a sliding mode. A second fixed heating part is fixedly arranged at the lowest bending point of the upper hot-pressing base, a second straight heating part extending along the bending face of the upper hot-pressing base is laid on the surface of the upper hot-pressing base, and one end of the second straight heating part is flexibly connected with the second fixed heating part. The bending die is ingenious in structure, practical and reliable, heat preservation and heating in the bending process are achieved, and the problem that an existing bending die is difficult to heat and preserve heat of a flexible medium density fiberboard during slow bending is solved.

Description

Technical Field

[0001] The utility model relates to a plate bending device, in particular to a continuous bending die for a flexible medium-fiber board. Background Art

[0002] Flexible MDF is a variant of MDF, primarily characterized by its lightness, thinness, and improved flexibility and ductility. Due to its flexibility, flexible MDF has found widespread application in specialized applications. To achieve the desired bending and shaping, flexible MDF requires a heat press process. In existing processes, hot flexible MDF is placed between molds. During the bending process, the hot flexible MDF is primarily bent using a mold equipped with a surface-mounted heating device. The mold's surface-mounted heating device primarily serves to maintain heat during the bending process. However, unlike metal, flexible MDF does not readily flex after heating. Therefore, bending flexible MDF is a slow process, heating only at the contact point between the mold and the MDF, while other areas cool. While this is acceptable for flexible MDF with a single bending section, flexible MDF with two bending sections requires continuous bending, which takes longer. During the slow bending process, the heat of the parts of the flexible MDF that are not in contact with the mold cannot be replenished, which will cause them to cool down, and eventually the temperature of these parts will not meet the bending requirements, resulting in poor bending effect of the flexible MDF after bending, and even cracking. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a continuous bending die for flexible medium-density fiberboard in view of the deficiencies in the prior art, thereby solving the problem that the prior bending die is difficult to heat and keep warm the flexible medium-density fiberboard during slow bending.

[0004] The utility model describes a continuous bending mold for a flexible medium-density fiberboard, comprising a lower hot pressing seat and two upper hot pressing seats; a hot pressing cavity corresponding to the upper hot pressing seat is opened in the lower hot pressing seat, and a fixed heating part 1 is fixedly provided between two adjacent hot pressing cavities, a flexible heating component extending along the surface is laid in the hot pressing cavity, one end of the flexible heating component is flexibly connected to the fixed heating part 1, and the other end of the flexible heating component is slidably mounted on the surface of the lower hot pressing seat; a fixed heating part 2 is fixed at the lowest bending point of the upper hot pressing seat, and a straight heating part 2 extending along its bending surface is laid on the surface of the upper hot pressing seat, one end of the straight heating part 2 is flexibly connected to the fixed heating part 2, and the other end of the straight heating part 2 is connected to a driver 1.

[0005] Preferably, the flexible heating assembly includes a straight heating part, a curved heating part and a sliding heating part; the straight heating part and the curved heating part are both laid on the surface of the hot pressing chamber, and the sliding heating part is located on the surface of the lower hot pressing seat and is slidably connected to the surface of the lower hot pressing seat.

[0006] Preferably, the straight heating part and the curved heating part are both composed of multiple heaters.

[0007] Preferably, two adjacent heating parts and two adjacent heaters are connected via a flexible heat conductor.

[0008] Preferably, the flexible heat-conducting member comprises a heat-conducting elastic rubber and a soft rope; a plurality of soft ropes are inserted into the heat-conducting elastic rubber, and both ends of the soft ropes serve as binding fixed ends.

[0009] Preferably, a second driver is installed on the lower hot pressing seat, and the second driver is transmission-connected to the sliding heating part.

[0010] Preferably, the second flat heating portion includes a mounting plate and a heater 1; the heater 1 is fixed on one side of the mounting plate, and the driving end of the driver 1 is slidably connected to the mounting plate through a hinge.

[0011] Beneficial effects

[0012] The advantages of the present invention are as follows: by providing the flexible heating assembly and fixed heating portion 1, as well as the flat heating portion 2 and fixed heating portion 2, in the lower hot pressing seat, the flexible heating assembly in the hot pressing chamber can be laid in the hot pressing chamber, or the flexible heating assembly can be straightened by sliding its end portion on the lower hot pressing seat so that it is located below the flexible medium-density fiberboard; and the flat heating portion 2 can also be moved above the flexible medium-density fiberboard under the driving action of the driver 1, so that the flexible heating assembly and the flat heating portion 2 form a surround around the flexible medium-density fiberboard, thereby achieving a better heating and heat preservation effect on the flexible medium-density fiberboard before bending. Moreover, during the downward movement of the upper hot pressing seat for bending, the flat heating portion 2 can be reset synchronously with the bending of the flexible medium-density fiberboard, and the flexible heating assembly can bend and move synchronously with the flexible medium-density fiberboard, so that the flexible medium-density fiberboard is always within the heating range of the flat heating portion 2 and the flexible heating assembly during the bending process, achieving heat preservation and heating during the bending process, and solving the problem that the existing bending mold is difficult to heat and preserve the flexible medium-density fiberboard during slow bending. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the internal structure of the continuous bending die of the present utility model;

[0014] Figure 2 This is a structural diagram of a flexible medium-density fiberboard placed on a continuous bending die of the utility model;

[0015] Figure 3 This is a schematic diagram of the internal structure of the flexible heat-conducting component of the present invention.

[0016] Among them: 1-lower hot pressing seat, 2-upper hot pressing seat, 3-hot pressing chamber, 4-flat heating part 2, 5-flexible heating component, 6-flexible heat conductor, 7-fixed heating part 1, 8-fixed heating part 2, 9-driver 1, 10-driver 2, 11-flexible medium-density fiberboard, 12-conical positioning block, 13-positioning groove, 41-mounting plate, 42-heater 1, 51-sliding heating part, 52-flat heating part 1, 53-curved heating part, 61-thermal conductive elastic rubber, 62-soft rope. DETAILED DESCRIPTION

[0017] The present invention will be further described below in conjunction with the embodiments, but this does not constitute any limitation to the present invention. Any limited modifications made by anyone within the scope of the claims of the present invention are still within the scope of the claims of the present invention.

[0018] See Figure 1-Figure 3The utility model discloses a continuous bending die for a flexible medium-density fiberboard, comprising a lower hot pressing seat 1 and two upper hot pressing seats 2. A hot pressing cavity 3 corresponding to the upper hot pressing seat 2 is provided in the lower hot pressing seat 1, and a fixed heating portion 7 is fixedly provided between the two hot pressing cavities 3. The fixed heating portion 7 is an arc-shaped structure, which provides lower support for the upper bending portion of the flexible medium-density fiberboard 3 and provides heating for the portion to achieve a heat preservation effect. A flexible heating component 5 extending along the surface is laid in the hot pressing cavity 3. One end of the flexible heating component 5 is flexibly connected to the fixed heating portion 7, and the other end of the flexible heating component 5 is slidably mounted on the surface of the lower hot pressing seat 1. In addition, a fixed heating portion 8 is fixedly provided at the lowest bending point of the upper hot pressing seat 2, which is also an arc-shaped structure, and is used to bend the flexible medium-density fiberboard 3, so that it bends downward and plays a role in heating and heat preservation. The upper hot press seat 2 is provided with a flat heating portion 2 4 extending along its bending surface. One end of the flat heating portion 2 4 is flexibly connected to the fixed heating portion 2 8, and the other end of the flat heating portion 2 is connected to a driver 1 9. Through the above design, the flexible heating component 5 in the hot press chamber 3 can be laid in the hot press chamber 3, or the flexible heating component 5 can be straightened by sliding its end on the lower hot press seat 1 so that it is located below the flexible medium-density fiberboard 3. Driven by the driver 1 9, the flat heating portion 2 4 can also be moved above the flexible medium-density fiberboard 3, so that the flexible heating component 5 and the flat heating portion 2 4 form an enclosure around the flexible medium-density fiberboard 3, achieving a better heating and heat-insulating effect on the flexible medium-density fiberboard 3 before bending. Moreover, during the downward movement of the upper hot pressing seat 2 for bending, the straight heating part 2 4 can be reset synchronously with the bending of the flexible medium-density fiberboard 3, and the flexible heating component 5 can bend and displace synchronously with the flexible medium-density fiberboard 3, so that the flexible medium-density fiberboard 3 is always within the heating range of the straight heating part 2 4 and the flexible heating component 5 during the bending process, realizing heat preservation and heating during the bending process, and solving the problem that the existing bending mold is difficult to heat and keep warm the flexible medium-density fiberboard 3 during slow bending.

[0019] In this embodiment, the flexible heating assembly 5 includes a straight heating portion 52, a curved heating portion 53, and a sliding heating portion 51. Both the straight heating portion 52 and the curved heating portion 53 are laid on the surface of the hot pressing chamber 3. The sliding heating portion 51 is located on the surface of the lower hot pressing seat 1 and is slidably connected to the surface of the lower hot pressing seat 1. The straight heating portion corresponds to the straight portion of the bent flexible MDF board 3, the curved heating portion 53 corresponds to the curved portion of the bent flexible MDF board 3, and the sliding heating portion 51 is located on the surface of the lower hot pressing seat 1, serving as support at both ends of the bent flexible MDF board 3.

[0020] In addition, to achieve the sliding of the sliding heating part 51, a second driver 10 is installed on the lower hot pressing seat 1 of this embodiment, and the second driver 10 is transmission-connected to the sliding heating part 51. The second driver 10 adopts an electric push rod, whose movable end is fixedly connected to the sliding heating part 51 to drive the sliding heating part 51.

[0021] The flat heating section 1 52 and the curved heating section 53 in the lower heat press 1 are each composed of multiple heaters, while the sliding heating section 51 can be a single, integrated heater. The flat heating section 2 4 and the fixed heating section 2 8 in the upper heat press 2 can also be a single, integrated heater. All adjacent heaters are connected by a flexible heat conductor 6, achieving a flexible connection between the heating section and the heater, and further establishing contact between the flexible heating assembly 5, the flat heating section 2 4, and the flexible MDF 3.

[0022] The flat heating part 2 4 in the upper hot pressing seat 2 includes a mounting plate 41 and a heater 1 42. The heater 1 42 is fixed to one side of the mounting plate 41, and the driving end of the driver 1 9 is slidably connected to the mounting plate 41 through a hinge. Among them, the driver 1 9 adopts an electric push rod. When the electric push rod is extended, the connection end thereof with the mounting plate 41 slides while rotating, so that the flat heating part 2 4 rotates and moves downward with its connection with the fixed heating part 2 8 as a fulcrum, and finally moves to a horizontal position, realizing contact heating with the flexible medium-density fiberboard 3. During the pressing process, the electric push rod drives the flat heating part 2 4 to reset, and its inclination angle during the reset process is consistent with the inclination angle of the flexible medium-density fiberboard 3 when it is pressed downward, so that the flat heating part 2 4 can also contact the flexible medium-density fiberboard 3 as much as possible during the reset process, thereby improving its heating and heat preservation effect.

[0023] The flexible heat-conducting element 6 comprises a thermally conductive elastic rubber 61 and a flexible cord 62. Multiple flexible cords 62 are inserted into the thermally conductive elastic rubber 61, with the ends of the cords 62 serving as binding ends, each of which is secured to the heater. The flexible cords 62 are made of high-temperature-resistant, non-stretchable material. The thermally conductive elastic rubber 61 is designed so that when the flexible MDF board 3 is bent into position, both sides of the thermally conductive elastic rubber 61 contact the corresponding heater, thereby achieving heat transfer and heating the spaced-apart location between the two heaters.

[0024] The working principle of the present invention is as follows: before placing the flexible medium-density fiberboard 3, the two actuators are first actuated to move the flat heating portion 2 4 and the flexible heating assembly 5 to a horizontal state. The flexible medium-density fiberboard 3 is then placed between the upper and lower heat press seats, and the upper heat press seat 2 is controlled to move downward, so that the flat heating portion 2 4 and the flexible heating assembly 5 form a clamp on the flexible medium-density fiberboard 3, so that both are in contact with the flexible medium-density fiberboard 3, thereby achieving heating and heat preservation of the flexible medium-density fiberboard 3. The upper heat press seat 2 is then controlled to continue moving downward to bend the flexible medium-density fiberboard 3. At the same time, the flat heating portion 2 4 is controlled to reset, and its inclination angle during the reset process is consistent with the inclination angle of the flexible medium-density fiberboard 3 during the downward bending process. The actuator 2 10 also drives the flexible heating assembly 5 to reset synchronously, so that the shape of the flexible heating assembly 5 is basically consistent with the bent shape of the flexible medium-density fiberboard 3, thereby achieving heating and heat preservation during the pressing process. When the flexible heating component 5 and the second flat heating part 4 are both reset, that is, the flexible heating component 5 extends along the surface of the hot pressing chamber 3 and the second flat heating part 4 is attached to the surface of the upper hot pressing seat 2, the pressing plate is completed.

[0025] To prevent misalignment of the curved heating portion 53 during the repositioning of the flexible heating assembly 5, this embodiment provides a fixed tapered positioning block 12 beneath the bottommost heater when the curved heating portion 53 is in the hot-pressing chamber 3. Accordingly, a positioning groove 13, identical in shape to but slightly larger than the tapered positioning block 12, is provided at the bottom of the hot-pressing chamber 3. This ensures that the flexible heating assembly 5 effectively adheres to the hot-pressing chamber 3 after repositioning, minimizing misalignment.

[0026] The above is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present invention. These modifications and improvements will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. A continuous bending die for flexible medium fiberboard, characterized in that: The invention comprises a lower hot pressing seat (1) and two upper hot pressing seats (2); a hot pressing cavity (3) corresponding to the upper hot pressing seat (2) is provided in the lower hot pressing seat (1); a fixed heating part (7) is fixedly provided between two adjacent hot pressing cavities (3); a flexible heating component (5) extending along the surface is laid in the hot pressing cavity (3); one end of the flexible heating component (5) is flexibly connected to the fixed heating part (7); the other end of the flexible heating component (5) is slidably mounted on the surface of the lower hot pressing seat (1); a fixed heating part (8) is fixedly provided at the lowest bending point of the upper hot pressing seat (2); a straight heating part (4) extending along the bending surface thereof is laid on the surface of the upper hot pressing seat (2); one end of the straight heating part (4) is flexibly connected to the fixed heating part (8); the other end of the straight heating part (9) is connected to a driver (9); The flexible heating assembly (5) includes a straight heating portion (52), a curved heating portion (53) and a sliding heating portion (51); the straight heating portion (52) and the curved heating portion (53) are both laid on the surface of the hot pressing chamber (3), and the sliding heating portion (51) is located on the surface of the lower hot pressing seat (1) and is slidably connected to the surface of the lower hot pressing seat (1); The straight heating portion (52) and the curved heating portion (53) are both composed of a plurality of heaters; Two adjacent heating parts and two adjacent heaters are connected via a flexible heat conducting member (6); The flexible heat-conducting member (6) comprises a heat-conducting elastic rubber (61) and a soft rope (62); a plurality of soft ropes (62) are inserted into the heat-conducting elastic rubber (61), and both ends of the soft ropes (62) serve as binding fixed ends; The flat heating portion 2 (4) comprises a mounting plate (41) and a heater 1 (42); the heater 1 (42) is fixed on one side of the mounting plate (41), and the driving end of the driver 1 (9) is slidably connected to the mounting plate (41) via a hinge.

2. The continuous bending die for flexible medium fiberboard according to claim 1, characterized in that: A second driver (10) is installed on the lower hot pressing seat (1), and the second driver (10) is transmission-connected to the sliding heating part (51).

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