A thermoforming apparatus for medium-density fiberboard

Abstract

This invention relates to the field of fiberboard hot pressing technology, specifically disclosing a hot pressing equipment for medium-density fiberboard (MDF). The equipment includes a base with a frame fixedly connected to the top. A hydraulic cylinder lowers the upper hot pressing mold to press the board. After hot pressing, the hydraulic cylinder moves upward, and a second motor rotates a lead screw, driving a sliding block to move a linkage rod, causing a demolding push plate to move outward and eject the formed product from the lower mold. Simultaneously, a first motor drives the base frame to rotate, causing the lower mold to flip. The bottom lower mold moves to the top, and the top lower mold flips to the bottom, allowing the product to fall onto a conveyor belt for discharge. Unpressed products can be placed into the top lower mold, and then the hydraulic cylinder continues to operate for further pressing. This two-set lower mold flipping design enables continuous and uninterrupted pressing production, reducing production interruption time and improving production efficiency.

Description

Technical Field

[0001] This invention relates to the field of hot pressing technology for fiberboard, and in particular to a hot pressing equipment for medium density fiberboard. Background Technology

[0002] Medium-density fiberboard (MDF), as an important type of engineered wood product, is made from wood fibers or other plant fibers as the main raw materials. It undergoes a series of processes, including fiber separation, gluing, laying and molding, and hot pressing. Currently, MDF production usually requires the use of hot pressing equipment. However, existing MDF hot pressing molding devices have certain limitations. For example, they have poor cushioning and shock absorption effects during use, resulting in reduced stability and affecting the quality of fiberboard production. Furthermore, after the fiberboard is processed, it is difficult to remove it from the hot pressing mold, which greatly reduces its practicality.

[0003] Chinese patent with publication number "CN216266623U" discloses a medium-density fiberboard hot pressing forming device, which includes a base plate, a support plate, a cross plate and a hydraulic cylinder, etc. The hydraulic cylinder can drive the push plate to move, and the hot pressing plate can process the fiberboard. In addition, through the cooperation of the limiting rod and other components, it can achieve buffering and shock absorption, reduce the adverse effects of processing vibration, improve processing stability, and improve the production quality of fiberboard.

[0004] However, while the aforementioned device can effectively assist in realizing the hydraulic function in practical applications, it often requires manual handling of the boards after hot pressing and demolding. The equipment usually needs to be paused during demolding, and production can only continue after the boards are removed. This indicates certain shortcomings, as production cannot be carried out continuously and the overall production efficiency is low. Furthermore, the upper and lower hot pressing molds cannot be replaced according to specific needs during the production process. Since medium-density fiberboard (MDF) has a wide range of applications and comes in different specifications, if the MDF specifications change, the entire production equipment needs to be replaced. Clearly, the existing production equipment has certain defects and deficiencies and needs to be improved. Summary of the Invention

[0005] The purpose of this invention is to provide a hot pressing molding apparatus for medium-density fiberboard (MDF) to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, in a first aspect, the present invention provides a hot pressing molding apparatus for medium-density fiberboard, comprising a base, a frame fixedly connected to the top of the base, a support frame fixedly installed on the rear side of the top of the base, a top frame fixedly installed on the top of the support frame, a hydraulic cylinder fixedly installed on the top of the top frame, a pressing mechanism fixedly installed at the bottom output end of the hydraulic cylinder through the top frame, an upper hot pressing mold installed at the bottom output end of the hydraulic cylinder through the pressing mechanism, an installation frame fixedly installed at the lower inner side of the frame, a conveyor belt rotatably connected inside the installation frame, a first motor fixedly installed at the upper side of one side of the top frame, the output end of the first motor fixedly installed at the base frame through the installation frame, and the base frame rotatably connected to the upper inner side of the frame.

[0007] Furthermore, the pressing mechanism includes a top plate, which is fixedly installed at the bottom output end of the hydraulic cylinder. A slide rail is fixedly installed at the bottom of the top plate, and a slide plate is slidably connected inside the slide rail. A limit component is fixedly installed at the top end of the slide rail, and the bottom of the limit component is inserted into the inner side of the slide plate. The bottom of the slide plate is fixedly connected to the top of the upper hot press mold.

[0008] Furthermore, the limiting component includes a concave frame and a limiting hole. The concave frame is fixedly installed on the upper side of one side of the top plate. The limiting hole is opened at the top of the top plate and one end of the slide plate. Telescopic springs are fixedly connected at equal intervals on the inner side of the concave frame. A base plate is fixedly installed at the bottom of the telescopic springs. A limiting shaft is fixedly connected to the bottom of the base plate. The limiting shaft passes through the limiting hole on the top plate, and the lower end of the limiting shaft is inserted into the inner side of the limiting hole on the slide plate.

[0009] Furthermore, a pull-out shaft is fixedly connected to the top of the base plate, and a bridge-type handrail is fixedly installed through the concave frame at the top of the pull-out shaft.

[0010] Furthermore, through holes are provided at the four corners of the top plate, and support shafts are fixedly installed at both the front and rear ends of the top sides of the platform, with the upper ends of the support shafts inserted into the through holes.

[0011] Furthermore, it includes a chute and a demolding mechanism. The chute is opened on the top and bottom sides of the base frame. The demolding mechanism is fixedly installed inside the base frame. The inner side of the chute is slidably connected to a slide rod. The outer side of the slide rod is fixedly installed with a base plate. The outer side of the base plate is fixedly installed with a lower hot press mold. A limiting mechanism is fixedly installed in the middle of the back of the base frame. The base plate is installed on the top and bottom of the platform through the limiting mechanism.

[0012] Furthermore, the demolding mechanism includes a demolding groove, a second motor, and a lead screw. The demolding groove is located at the top and bottom center of the base frame, and also at the center of the lower hot press mold. The lead screw is rotatably connected to the inner center of the base frame. The second motor is fixedly installed on the center of the base frame away from the limiting mechanism. The output end of the second motor is fixedly connected to the end of the lead screw. The two ends of the lead screw have opposite thread directions. Both ends of the lead screw are threaded with sliding blocks. The sliding blocks are slidably connected to the inner sides of the base frame. Hinge grooves are provided on the top and bottom sides of the sliding blocks. A linkage rod is rotatably connected to the inner side of each hinge groove. A hinge seat is rotatably connected to the inner side of each linkage rod. A demolding push plate is fixedly connected to the outer side of the hinge seat. The demolding push plate is movably connected to the inside of the demolding groove.

[0013] Furthermore, the limiting mechanism includes a limiting groove and a limiting frame. The limiting groove is opened in the middle of the rear side of the substrate. Both ends of the limiting frame are fixedly connected to limiting springs. The outer ends of the limiting springs are fixedly connected to limiting brackets. The limiting brackets are U-shaped, and the outer ends of the limiting brackets are inserted into the inside of the limiting groove.

[0014] Furthermore, a pusher is fixedly connected to the inner end of the back of the limiting frame, and an elliptical guide block is rotatably connected to the middle of the back of the limiting frame. The elliptical guide block and the pusher are fitted together, and the inner end of the pusher is arc-shaped.

[0015] Furthermore, the overall cross-sectional shape of the slide groove and the slide rod is convex, and an adjustment handle is fixedly connected to the back of the elliptical guide block. The adjustment handle is hexagonal and the outer corners of the adjustment handle are rounded.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] Firstly, in this invention, the simple action of pulling out the bridge-type handrail drives the base plate to move the limiting shaft upward, causing the telescopic spring to contract. This allows the slide plate to be inserted into the slide rail. Once the slide plate is fully inserted, releasing the handrail causes the telescopic spring to reset and push the limiting shaft into the limiting hole of the slide plate, thus facilitating the installation of the upper hot press mold. Similarly, when disassembling or replacing the mold, simply pull out the handrail again. This design allows the device to quickly complete the installation and replacement of the upper hot press mold, greatly improving flexibility and convenience. It enables the device to adapt to different production needs, efficiently completing related operations without cumbersome steps. Moreover, the operation process is clear, easy to understand, and easy to master and execute.

[0018] Secondly, in this invention, a hydraulic cylinder is used to move the upper hot-pressing mold downwards to press the sheet metal. After hot pressing, the hydraulic cylinder moves upwards, and then the second motor is started to rotate the lead screw, which drives the sliding block to move the linkage rod to move the demolding push plate outwards, pushing the formed product out of the lower mold. At the same time, the first motor drives the base frame to rotate to realize the flipping of the lower mold. The bottom lower mold moves to the top, and the top lower mold flips to the bottom, and the product falls into the conveyor belt for discharge. Unpressed products can be put into the top lower mold, and then the hydraulic cylinder is started again for stamping production. This two-set lower mold flipping design realizes a continuous and uninterrupted stamping production process, improves production efficiency, reduces production interruption waiting time, makes the whole production process smoother and more efficient, and reduces production costs.

[0019] Thirdly, in this invention, the elliptical guide block is rotated by twisting the adjustment handle, which in turn pushes the push frame, causing the two limiting frames to move outward. This extends the limiting spring and disengages the outer end of the limiting frame from the limiting groove. At this point, the substrate loses its limit, allowing the substrate and its sliding rod to be pulled out, thus removing the lower mold. During installation, the sliding rod of the lower mold is inserted into the sliding groove, the adjustment handle is released, the taut limiting spring is reset, and the limiting frame moves inward into the limiting groove, completing the substrate snap-fit ​​installation. This design allows the device to quickly disassemble and assemble the lower mold, making it more convenient to adapt to the production and processing needs of fiberboards of different specifications. It allows for flexible adjustment when facing different production tasks, making the operation simple and efficient, and reducing the difficulty and time cost of changing molds. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the structure viewed from below in this invention;

[0022] Figure 3 This is a schematic diagram of the pressing mechanism and its structure in this invention;

[0023] Figure 4 This is a schematic diagram of the mold pressing mechanism and the mold pressing mechanism in their separated state in this invention;

[0024] Figure 5 This is a rear view schematic diagram of the lower hot pressing mold, demolding mechanism, and limiting mechanism in this invention;

[0025] Figure 6 This is a schematic diagram of the structure of the lower hot pressing mold and the base frame in the separated state in this invention;

[0026] Figure 7 This is a schematic diagram of the demolding mechanism inside the base frame in this invention;

[0027] Figure 8 This is a schematic diagram of the lower hot pressing mold and demolding mechanism in this invention;

[0028] Figure 9 This is a schematic diagram of the limiting mechanism in this invention.

[0029] In the diagram: 1. Base; 2. Platform; 3. Support frame; 4. Top frame; 5. Hydraulic cylinder; 6. Pressing mechanism; 61. Top plate; 62. Slide rail; 63. Slide plate; 64. Limiting component; 641. Concave frame; 642. Limiting hole; 643. Telescopic spring; 644. Base plate; 645. Limiting shaft; 646. Bridge-type handrail; 647. Pull-out shaft; 65. Upper hot press mold; 7. Limiting mechanism; 71. Limiting groove; 72. Limiting frame; 73. Limiting spring; 74. Limiting... 75. Position frame; 76. Push frame; 77. Elliptical guide block; 78. Adjusting handle; 9. Mounting frame; 10. Conveyor belt; 11. First motor; 12. Base frame; 13. Through hole; 14. Support shaft; 15. Slide groove; 16. Demolding mechanism; 17. Demolding groove; 18. Lead screw; 19. Sliding block; 10. Demolding push plate; 10. Hinge groove; 11. Linkage rod; 12. Hinge seat; 13. Second motor; 14. Slide rod; 15. Base plate; 16. Lower hot press mold. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Please see Figures 1-9In this embodiment of the invention, a hot pressing molding device for medium-density fiberboard (MDF) is provided. The device has a hot pressing temperature range of 180℃-250℃, a hot pressing pressure range of 2MPa-8MPa, a holding time range of 10s-60s, a mold length range of 0.5m-2m, a mold width range of 0.3m-1.5m, a hydraulic cylinder stroke range of 0.2m-1m, a lead screw pitch range of 5mm-20mm, and a demolding push plate stroke range of 0.1m-0.5m. The components include: a conveyor belt 9 with a speed range of 0.1 m / s to 0.5 m / s; a telescopic spring 643 with an elastic coefficient range of 10 N / mm to 50 N / mm; and a medium-density fiberboard thermoforming assembly, comprising a base 1, a platform 2 fixedly connected to the top of the base 1, a support frame 3 fixedly installed on the rear side of the top of the base 1, a top frame 4 fixedly installed on the top of the support frame 3, a hydraulic cylinder 5 fixedly installed on the top of the top frame 4, and a pressing mechanism 6 fixedly installed at the bottom output end of the hydraulic cylinder 5 through the top frame 4. The output end of the unit is equipped with an upper hot press mold 65 via a pressing mechanism 6. An installation frame 8 is fixedly installed on the lower inner side of the platform 2. A conveyor belt 9 is rotatably connected inside the installation frame 8. A first motor 10 is fixedly installed on the upper side of one side of the top frame 4. The output end of the first motor 10 passes through the installation frame 8 and is fixedly installed with a base frame 11. The base frame 11 is rotatably connected to the upper inner side of the platform 2. A hydraulic cylinder 5 can precisely control the movement of the upper hot press mold 65 to achieve efficient hot pressing. The pressing mechanism 6 ensures the stability of the mold installation. The conveyor belt 9 on the inner side of the platform 2 facilitates product transportation. The first motor 10 drives the base frame 11 to rotate, realizing continuous production operation and improving production efficiency. The overall design is reasonable, and the components work together to make the hot pressing process efficient, stable, and reliable. At the same time, by setting a limiting mechanism 7, the device can quickly disassemble and assemble the mold during specific applications, adapting to the production and processing of fiberboard of different specifications. This design enhances the flexibility and adaptability of the device, allowing for convenient mold replacement and improving production efficiency.

[0032] Please see Figures 3-4The pressing mechanism 6 includes a top plate 61, which is fixedly installed at the bottom output end of the hydraulic cylinder 5. A slide rail 62 is fixedly installed at the bottom of the top plate 61, and a slide plate 63 is slidably connected inside the slide rail 62. A limit component 64 is fixedly installed at the top end of the slide rail 62, and the bottom of the limit component 64 is inserted into the inner side of the slide plate 63. The bottom of the slide plate 63 is fixedly connected to the top of the upper hot pressing mold 65. The top plate 61 ensures a stable connection with the output end of the hydraulic cylinder 5. The slide rail 62 provides a stable sliding track for the slide plate 63, making the movement of the upper hot pressing mold 65 more precise and stable, and enabling it to better cooperate with the components below for hot pressing operations. The limit component 64 ensures the accuracy and stability of the position of the slide plate 63 within the slide rail 62, preventing it from sliding randomly and ensuring precise control of the mold position during the hot pressing process. This improves the quality and effect of hot pressing, ensures the smooth progress of the entire hot pressing molding operation, and facilitates the quick and stable installation of the upper mold.

[0033] Please see Figures 3-4 The limiting component 64 includes a concave frame 641 and a limiting hole 642. The concave frame 641 is fixedly installed on the upper side of one side of the top plate 61. The limiting hole 642 is opened at the top of the top plate 61 and one end of the slide plate 63. Telescopic springs 643 are fixedly connected at equal intervals to the inner side of the concave frame 641. A base plate 644 is fixedly installed at the bottom of the telescopic springs 643. A limiting shaft 645 is fixedly connected to the bottom of the base plate 644. The limiting shaft 645 passes through the limiting hole 642 on the top plate 61, and the lower end of the limiting shaft 645 is inserted into the inner side of the limiting hole 642 on the slide plate 63. The concave frame 641 provides a stable support for components such as the telescopic springs 643. The base plate 644 and the top plate 61 are tightly connected to ensure the integrity of the structure. The tension springs 643, which are set at equal intervals, can provide uniform and stable elastic force, making the operation of the base plate 644 and the limiting shaft 645 reliable. The cooperation between the limiting shaft 645 and the limiting holes 642 on the top plate 61 and the slide plate 63 can accurately limit the position of the slide plate 63, ensuring the stability of the upper hot press mold 65 during operation, avoiding unnecessary displacement, and ensuring the accuracy and consistency of the hot press operation. This limiting component 64 has a simple and effective structure and plays an important role in ensuring the normal operation of the device and the quality of hot press.

[0034] Please see Figures 3-4 A pull-out shaft 647 is fixedly connected to the top of the base plate 644. A bridge-type handrail 646 is fixedly installed through the concave frame 641 at the top of the pull-out shaft 647. The arrangement of the pull-out shaft 647 and the bridge-type handrail 646 makes the operation of the limiting component 64 more convenient and intuitive. By pulling the bridge-type handrail 646, the pull-out shaft 647 can be driven, thereby easily controlling the base plate 644 and the limiting shaft 645. This facilitates operations such as disassembling or fixing the upper hot press mold 65, improving the convenience and efficiency of human-machine interaction.

[0035] Please see Figures 1-4 The top plate 61 has through holes 12 at each of its four corners. Support shafts 13 are fixedly installed on both sides of the top of the platform 2. The upper end of the support shaft 13 is inserted into the through hole 12. The through holes 12 at the four corners of the top plate 61 cooperate with the support shafts 13 on the top of the platform 2. On the one hand, this provides stable support and guidance for the top plate 61 and the upper hot press mold 65 installed below it, ensuring that it can move accurately in the vertical direction and guaranteeing the accuracy and stability of the hot press operation. On the other hand, this plug-in structure is simple and reliable, making the overall structure of the device compact. It can effectively reduce shaking and deviation during operation, and enhance the durability and reliability of the device.

[0036] Please see Figures 5-9 A hot pressing molding apparatus for medium-density fiberboard (MDF) includes a chute 14 and a demolding mechanism 15. The chute 14 is formed on both the top and bottom sides of a base frame 11. The demolding mechanism 15 is fixedly installed inside the base frame 11. Slide rods 16 are slidably connected to the inner sides of the chute 14. A base plate 17 is fixedly installed on the outer side of the slide rods 16. A lower hot pressing mold 18 is fixedly installed on the outer side of the base plate 17. A limiting mechanism 7 is fixedly installed in the middle of the back of the base frame 11. The base plate 17 is installed on the top and bottom of the frame 2 via the limiting mechanism 7. The design of the chute 14 and slide rods 16 allows the lower hot pressing mold 18 to be mounted on the base frame 11. The upper platen 17 slides smoothly, facilitating the replacement of the lower hot press mold 18 and improving the convenience and efficiency of operation. The demolding mechanism 15 enables efficient demolding, helping to quickly separate the molded product from the mold and improve the continuity of production. The limiting mechanism 7 installs the base plate 17 on the frame 2, ensuring the stability of the lower hot press mold 18 during operation and guaranteeing the smooth progress of the hot pressing process. It also facilitates the fixing and disassembly of the lower hot press mold 18, enhancing the flexibility and operability of mold installation. This design gives the entire hot press mold system good adaptability and working performance.

[0037] Please see Figures 5-9The demolding mechanism 15 includes a demolding groove 151, a second motor 158, and a lead screw 152. The demolding groove 151 is located at the top center and bottom center of the base frame 11, and is also located in the middle of the lower hot press mold 18. The lead screw 152 is rotatably connected to the inner center of the base frame 11. The second motor 158 is fixedly installed on the center of the side of the base frame 11 away from the limiting mechanism 7. The output end of the second motor 158 is fixedly connected to the end of the lead screw 152. The two ends of the rod 152 have opposite thread directions. Both ends of the lead screw 152 are threadedly connected to sliding blocks 153. The sliding blocks 153 are slidably connected to the inner sides of the base frame 11. Hinge grooves 155 are provided on both the top and bottom sides of the sliding blocks 153. A linkage rod 156 is rotatably connected to the inner side of each hinge groove 155. A hinge seat 157 is rotatably connected to the inner side of the linkage rod 156. A demolding push plate 154 is fixedly connected to the outer side of the hinge seat 157. Plate 154 is movably connected inside the demolding groove 151. The design of the demolding groove 151 provides space for the demolding push plate 154 to move, enabling precise demolding operations. The screw 152 and its opposite thread directions at both ends allow it to synchronously drive the sliding blocks 153 at both ends to move in opposite directions, achieving efficient power transmission and motion control. The cooperation between the sliding block 153 and the linkage rod 156 can convert the rotational motion of the screw 152 into the linear motion of the demolding push plate 154. This transmission method is stable and reliable. The design of the hinge groove 155 and the hinge seat 157 ensures the flexibility and mobility of the connection of each component. The movement of the demolding push plate 154 within the demolding groove 151 can accurately push the molded product out of the lower hot press mold 18, improving demolding efficiency and effect, reducing the difficulty and time of manual operation, and enhancing the automation and production efficiency of the entire hot press molding process.

[0038] Please see Figures 5-9 The limiting mechanism 7 includes a limiting groove 71 and a limiting frame 72. The limiting groove 71 is located in the middle of the rear side of the substrate 17. Limiting springs 73 are fixedly connected to both ends of the limiting frame 72. A limiting bracket 74 is fixedly connected to the outer end of the limiting springs 73. The limiting bracket 74 is U-shaped and its outer end is inserted into the inside of the limiting groove 71. The cooperation between the limiting groove 71 and the limiting frame 72 effectively limits the position of the substrate 17. The limiting springs 73 in the limiting frame 72 provide elastic support for the limiting bracket 74, making the limiting bracket 74 and the limiting groove 71 firmly connected. This effectively prevents unnecessary shaking or displacement of the substrate 17 during operation, ensuring the stability and accuracy of the lower hot press mold 18 during operation. The U-shaped limiting bracket 74 design can better fit with the limiting groove 71, providing a more reliable limiting effect. This simple and effective limiting mechanism 7 enhances the reliability and safety of the entire hot press mold system during operation, and also facilitates installation and disassembly, improving the convenience of operation.

[0039] Please see Figures 5-9 The inner end of the back of the limiting frame 74 is fixedly connected to a pusher 75. An elliptical guide block 76 is rotatably connected to the middle of the back of the limiting frame 72. The elliptical guide block 76 and the pusher 75 are in close contact. The inner end of the pusher 75 is arc-shaped. The pusher 75 facilitates the control of the limiting frame 74. Through its close contact with the elliptical guide block 76, when the elliptical guide block 76 is rotated, its shape characteristics can be used to smoothly push the pusher 75 to move, thereby realizing convenient adjustment of the position of the limiting frame 74 and improving the flexibility and controllability of operation. The arc-shaped setting of the inner end of the pusher 75 makes the contact with the elliptical guide block 76 smoother, reducing friction and jamming, and ensuring the continuity of action. This ingenious design allows the operator to easily switch the limiting state, and both fixing and unlocking the base plate 17 can be completed quickly and accurately.

[0040] Please see Figures 5-9 The overall cross-sectional shape of the slide groove 14 and the slide rod 16 is convex. An adjustment handle 77 is fixedly connected to the back of the elliptical guide block 76. The adjustment handle 77 is hexagonal and the outer corners of the adjustment handle 77 are rounded. The convex shape of the slide groove 14 and the slide rod 16 makes their fit tighter and more stable, effectively preventing the slide rod 16 from accidentally coming out of the slide groove 14, ensuring the safety and reliability of the substrate 17 during the sliding process. It can also better guide and limit the movement direction of the substrate 17, making the sliding more precise. The adjustment handle 77 on the back of the elliptical guide block 76 is hexagonal and has multiple operating surfaces, making it convenient for operators to hold and operate from different angles, increasing the convenience of operation. The rounded outer corners not only avoid the possible injury caused by sharp corners, but also make the operation more comfortable and reduce the discomfort that may be caused to the operator's hands during operation.

[0041] The working principle of this invention is as follows: By setting a limiting mechanism 7 in conjunction with a pressing mechanism 6, the bottom plate 644 can be pulled up by the pull-out bridge handrail 646, causing the limiting shaft 645 to move upward. The telescopic spring 643 contracts, and the pull-out shaft 647 moves upward, thus pulling the limiting shaft 645 away from the limiting hole 642. At this time, the slide plate 63 can be inserted into the slide rail 62. When the slide plate 63 is completely submerged in the slide rail 62, the bridge handrail 646 is released, and the telescopic spring 643 returns to its original position, which in turn causes the bottom plate 644 to push the limiting shaft 645 downward and insert it into the limiting hole 642. Inside, the end of the limiting shaft 645 is inserted into the limiting hole 642 on the slide plate 63. The limiting shaft 645 limits the slide plate 63, which helps to install the upper hot press mold 65 on the bottom of the top plate 61. Similarly, when it is necessary to disassemble and replace the upper hot press mold 65, simply pull out the bridge handrail 646 again to pull out the limiting shaft 645 again. The limiting shaft 645 and the limiting hole 642 are separated, and the slide plate 63 can be pulled out from the inside of the slide rail 62 again. This makes it easy to quickly install the hot press mold 65, and facilitates flexible adaptation and use of this device.

[0042] By setting up the first motor 10 in conjunction with the frame 2, the upper hot press mold 65 can be moved downward by starting the hydraulic cylinder 5. The downward movement of the upper hot press mold 65 can assist in stamping the sheet material on the top of the lower hot press mold 18. Extrusion molding is achieved by the mutual pressing of the upper hot press mold 65 and the lower hot press mold 18. After hot pressing is completed, the hydraulic cylinder 5 is moved upward, and the second motor 158 is started. The second motor 158 drives the lead screw 152 to rotate. The two ends of the lead screw 152 have opposite threads, which can synchronously drive the sliding block 153 to reciprocate inside the base frame 11. The synchronous movement of the two sliding blocks 153 can assist in pushing the end of the linkage rod 156 to move outward through the hinge seat 157 to the demolding push plate 154. The outward movement of the demolding push plate 154 can extrude the lower plate. The product movement inside the mold is achieved by starting the first motor 10, which drives the base frame 11 to rotate inside the sleeve frame, thus flipping the base frame 11. At this time, the bottom lower mold moves to the top and the top lower mold flips to the bottom. Since the formed product is pushed out, it can automatically fall into the conveyor belt 9. By starting the conveyor belt 9, the product can be automatically discharged. During this process, the bottom mold is flipped to the top, and the un-hot-pressed product can be placed into the bottom lower mold at the top. Then, by starting the hydraulic cylinder 5, it can continue to run and perform stamping production again. It can be seen that the two-set lower mold flipping design can perform continuous and uninterrupted stamping production, which can improve the overall production efficiency of this device.

[0043] By setting a limiting mechanism 7, when it is necessary to change the lower mold during use, the adjusting handle 77 can be turned to rotate, which drives the elliptical guide block 76 to rotate. The rotation of the elliptical guide block 76 can assist in pushing the pusher 75. Since the two ends of the elliptical guide block 76 are narrow and long, it can squeeze and push the pusher 75, causing the pusher 75 to drive the two limiting frames 74 to move outward. The outward movement of the limiting frames 74 can assist in pushing the limiting spring 73 to extend. At this time, the limiting spring 73 is in a taut state, and the outer end of the limiting frame 74 is disengaged from the limiting groove 71. The limiting groove 71 and the limiting frame 74 on the base plate 17 are separated. When the substrate 17 is removed, it can be pulled to move the slide bar 16 out of the slide groove 14. The slide groove 14 and the slide bar 16 are separated, and the lower mold can be removed. When installation is required, simply insert the slide bar 16 on the lower mold into the slide groove 14, release the adjusting handle 77, and the tensioned limiting spring 73 will return to its original position. Then, the limiting frame 74 can be pulled inward. The limiting frame 74 can be reinserted into the inner side of the limiting groove 71. The limiting frame 74 and the limiting groove 71 are interlocked and limited, which can assist in the snap-fit ​​installation of the substrate 17. It can be seen that the device can quickly disassemble and assemble the lower mold, and can be more conveniently adapted to the production and processing of fiberboard of different specifications, which can improve the overall performance of the device.

Claims

1. A hot pressing forming device for medium-density fiberboard, characterized in that, The system includes a base (1), a platform (2) fixedly connected to the top of the base (1), a support frame (3) fixedly installed on the rear side of the top of the base (1), a top frame (4) fixedly installed on the top of the support frame (3), a hydraulic cylinder (5) fixedly installed on the top of the top frame (4), a pressing mechanism (6) fixedly installed through the top frame (4) at the bottom output end of the hydraulic cylinder (5), an upper hot press mold (65) installed at the bottom output end of the hydraulic cylinder (5) through the pressing mechanism (6), an installation frame (8) fixedly installed on the lower inner side of the platform (2), a conveyor belt (9) rotatably connected inside the installation frame (8), a first motor (10) fixedly installed on the upper side of one side of the platform (2), the output end of the first motor (10) spans across the top of the installation frame (8) and a base frame (11) fixedly installed thereon, and the base frame (11) rotatably connected to the upper inner side of the platform (2). Includes a chute (14) and a demolding mechanism (15). The chute (14) is opened on the top and bottom sides of the base frame (11). The demolding mechanism (15) is fixedly installed inside the base frame (11). The inner side of the chute (14) is slidably connected with a slide rod (16). The outer side of the slide rod (16) is fixedly installed with a base plate (17). The outer side of the base plate (17) is fixedly installed with a lower hot press mold (18). The middle of the back of the base frame (11) is fixedly installed with a limiting mechanism (7). The base plate (17) is installed on the top and bottom of the platform (2) through the limiting mechanism (7). The demolding mechanism (15) includes a demolding groove (151), a second motor (158), and a lead screw (152). The demolding groove (151) is located at the top center and bottom center of the base frame (11). The demolding groove (151) is also located in the middle of the lower hot press mold (18). The lead screw (152) is rotatably connected to the inner center of the base frame (11). The second motor (158) is fixedly installed on the middle of the side of the base frame (11) away from the limiting mechanism (7). The output end of the second motor (158) is fixedly connected to the end of the lead screw (152). The two ends of the lead screw (152) are screwed together. With opposite spiral directions, both ends of the lead screw (152) are threaded with sliding blocks (153). The sliding blocks (153) are slidably connected to the inner sides of the base frame (11). The top and bottom sides of the sliding blocks (153) are provided with hinge slots (155). The inner side of the hinge slots (155) is rotatably connected with a linkage rod (156). The inner side of the linkage rod (156) is rotatably connected with a hinge seat (157). The outer side of the hinge seat (157) is fixedly connected with a demolding push plate (154). The demolding push plate (154) is movably connected to the inside of the demolding groove (151). The limiting mechanism (7) includes a limiting groove (71) and a limiting frame (72). The limiting groove (71) is opened in the middle of the rear side of the substrate (17). Limiting springs (73) are fixedly connected to both ends of the limiting frame (72). A limiting bracket (74) is fixedly connected to the outer end of the limiting spring (73). The limiting bracket (74) is U-shaped. The outer end of the limiting bracket (74) is inserted into the inside of the limiting groove (71). The inner end of the back of the limiting frame (74) is fixedly connected to a pusher (75), and the middle of the back of the limiting frame (72) is rotatably connected to an elliptical guide block (76). The elliptical guide block (76) and the pusher (75) are closely connected, and the inner end of the pusher (75) is arc-shaped. The overall cross-sectional shape of the slide groove (14) and slide rod (16) is convex. An adjustment handle (77) is fixedly connected to the back of the elliptical guide block (76). The adjustment handle (77) is hexagonal and the outer corners of the adjustment handle (77) are rounded.

2. The hot pressing equipment for medium-density fiberboard according to claim 1, characterized in that, The pressing mechanism (6) includes a top plate (61), which is fixedly installed at the bottom output end of the hydraulic cylinder (5). A slide rail (62) is fixedly installed at the bottom of the top plate (61). A slide plate (63) is slidably connected inside the slide rail (62). A limit component (64) is fixedly installed at one top end of the slide rail (62). The bottom of the limit component (64) is inserted into the inner side of the slide plate (63). The bottom of the slide plate (63) is fixedly connected to the top of the upper hot press mold (65).

3. The hot pressing equipment for medium-density fiberboard according to claim 2, characterized in that, The limiting component (64) includes a concave frame (641) and a limiting hole (642). The concave frame (641) is fixedly installed on the upper side of one side of the top plate (61). The limiting hole (642) is opened at the top of the top plate (61) and one end of the slide plate (63). The inner side of the concave frame (641) is fixedly connected with telescopic springs (643) at equal intervals. The bottom of the telescopic springs (643) is fixedly installed with a base plate (644). The bottom of the base plate (644) is fixedly connected with a limiting shaft (645). The limiting shaft (645) passes through the limiting hole (642) on the top plate (61). The lower end of the limiting shaft (645) is inserted into the inner side of the limiting hole (642) on the slide plate (63).

4. The hot pressing equipment for medium-density fiberboard according to claim 3, characterized in that, A pull-out shaft (647) is fixedly connected to the top of the base plate (644), and a bridge-type handrail (646) is fixedly installed through the concave frame (641) at the top of the pull-out shaft (647).

5. The hot pressing equipment for medium-density fiberboard according to claim 2, characterized in that, The top plate (61) has through holes (12) at all four corners. The top two sides of the platform (2) are fixedly installed with support shafts (13), and the upper end of the support shafts (13) is inserted into the through holes (12).

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