A multi-layer hot press

Abstract

This utility model discloses a multi-layer hot press, including a base. A lower pressure plate is mounted on the base via a hydraulic cylinder and a lifting plate. A top plate is mounted on the base via an upper frame. Multiple carrier plates are evenly spaced between the lower pressure plate and the top plate. A support beam and a crossbeam are hinged between the lifting plate and the top plate. A central connecting rod is hinged to both sides of the carrier plates. A support sleeve is rotatably mounted inside the crossbeam. One end of the central connecting rod slides through the support sleeve and is fitted with a spring through a limiting plate. A limiting nut is provided at one end of the limiting plate. A detachable hot press template is provided in the through hole of the lower pressure plate. This utility model utilizes the spring to provide elastic force for reset when the lower pressure plate is driven to move downward by the hydraulic cylinder, relieving pressure on the hydraulic cylinder and improving its service life. It also improves the stability of the transmission between the lower pressure plate, multiple carrier plates, and the top plate.

Description

Technical Field

[0001] This utility model relates to the field of hot press technology, specifically a multi-layer hot press. Background Technology

[0002] A hot press is a device that achieves electromechanical connection through heating and pressure. Its working principle is mainly based on pulse heating technology or electromagnetic heaters, combined with temperature sensors to achieve precise temperature control. There are various types of hot presses, including constant temperature hot presses, pulse hot presses, and vacuum hot presses, suitable for multiple industrial fields such as forging, stamping, and wood processing. Plywood, also known as blockboard or core board, is made by gluing and pressing two veneers together with a core of wood strips. The core is made of high-quality natural wood strips that have been heat-treated (i.e., dried in a drying chamber) and then processed into strips of a certain size, which are then spliced ​​together by a splicing machine. Two layers of high-quality veneer are then applied to each side of the spliced ​​wood strips, and finally, they are glued together using cold and hot presses.

[0003] The prior art, patent application number 201410851423.4, describes a multi-layer hot press for wood panels, belonging to the field of wood panel processing. It includes a frame, pressure plate cylinders, an upper pressure plate, a carrier plate, a lower pressure plate, side positioning rods, suspension positioning rods, and hot air pipes. The pressure plate cylinders are connected to the lower pressure plate, and several carrier plates are positioned between the upper and lower pressure plates. It also includes a synchronous closing device, comprising synchronous linkage mechanisms symmetrically distributed on both sides of the frame. These linkage mechanisms include an upper linkage, a lower linkage, and several intermediate linkages. This invention is used for the hot pressing process in wood panel processing, offering advantages such as high automation, high production efficiency, and good quality processed wood panels. However, it cannot relieve the pressure on the hydraulic cylinders, and continuous high-load operation can easily affect the service life of the hydraulic cylinders. Utility Model Content

[0004] The purpose of this invention is to provide a multi-layer hot press to solve the problem that existing technologies cannot relieve the pressure of hydraulic cylinders, and that continuous high-load operation can easily affect the service life of hydraulic cylinders.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a multi-layer hot press, including a base, a lower pressure plate provided on the upper side of the base via a hydraulic cylinder and a lifting plate, a top plate provided on the upper side of the base via an upper frame, multiple carrier plates provided at equal intervals between the lower pressure plate and the top plate, a support beam and a crossbeam hinged between the lifting plate and the top plate, a central connecting rod hinged on both sides of the carrier plate, a support sleeve rotatably provided inside the crossbeam, one end of the central connecting rod slidingly through the support sleeve and a spring sleeved through a limiting plate, a limiting nut provided at one end of the limiting plate, and a detachable hot press template provided in the through holes inside the lower pressure plate, the top plate and the carrier plates.

[0006] Furthermore, the outer side of one end of the central connecting rod is provided with an external thread, and the limiting nut is provided with an internal thread that is threadedly connected to the external thread.

[0007] Furthermore, the hydraulic cylinder is provided in multiple parts, and one end of the hydraulic cylinder is connected to an oil storage tank through an oil supply pipe and an oil pump.

[0008] Furthermore, the lower pressure plate, the top plate, and the carrier plate are provided with two limiting grooves at one end, and limiting sliders are provided in the two limiting grooves through screw threads facing each other. A limiting block is provided on one side of the limiting slider, and locking grooves are provided on both sides of the hot pressing template to engage with the limiting block laterally.

[0009] Furthermore, the lead screw has two opposite external threads on its outer sides at both ends, and one end of the lead screw is provided with an adjustment handle and a locking bolt.

[0010] Furthermore, the limiting slider and the limiting block are integrally configured as an L-shaped support block, and the limiting block can be completely retracted into the limiting groove when not in use.

[0011] Compared with the prior art, the beneficial effects of this utility model are: This utility model uses a central connecting rod that slides through a support sleeve and is fitted with a spring through a limiting plate. A limiting nut is provided at one end of the limiting plate. The spring provides elastic force to reset when the hydraulic cylinder drives the lower pressure plate to move downward, which relieves the pressure on the hydraulic cylinder and helps to improve the service life of the hydraulic cylinder. At the same time, it helps to improve the stability of the transmission between the lower pressure plate, multiple carrier plates and the top plate.

[0012] This utility model features two limiting grooves within the lower pressure plate, top plate, and carrier plate, with limiting sliders threaded towards each other via screw rods within these grooves. Each limiting slider has a limiting block on one side, and the hot-pressing template has locking grooves on both sides that engage laterally with the limiting blocks. This allows the rotating screw rod to adjust the relative movement of the two limiting sliders and the two limiting blocks. When the two limiting blocks are engaged in the locking grooves on the outer wall of the hot-pressing template, the template is locked within the lower pressure plate, top plate, and carrier plate. Furthermore, the hot-pressing template exhibits high stability during installation and is easy and quick to assemble and disassemble. Attached Figure Description

[0013] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a first-view structural diagram of the present invention; Figure 2 This is a schematic diagram of the second-view structure of the present invention; Figure 3 This is a schematic diagram of the carrier plate structure of this utility model; Figure 4 This is a schematic diagram of the template in the hot pressing process of this utility model.

[0014] In the diagram: 1. Base; 2. Upper frame; 3. Hydraulic cylinder; 4. Lifting plate; 5. Lower pressure plate; 6. Support beam; 7. Crossbeam; 8. Middle connecting rod; 9. Support sleeve; 10. Limiting plate; 11. Top plate; 12. Limiting nut; 13. Spring; 14. Oil reservoir; 15. Locking groove; 16. Hot pressing template; 17. Through hole; 18. Limiting slide groove; 19. Limiting slider; 20. Limiting block; 21. Lead screw; 22. Adjusting handle; 23. Locking bolt; 24. Carrier plate. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 In this embodiment of the utility model, a multi-layer hot press includes a base 1. A lower pressure plate 5 is provided on the upper side of the base 1 via hydraulic cylinders 3 and a lifting plate 4. Multiple hydraulic cylinders 3 are provided, and one end of each cylinder 3 is connected to an oil storage tank 14 via an oil pipe and an oil pump, facilitating hydraulic adjustment of the lifting plate 4. A top plate 11 is provided on the upper side of the base 1 via an upper frame 2. Multiple carrier plates 24 are provided at equal intervals between the lower pressure plate 5 and the top plate 11. A support beam 6 and a crossbeam 7 are hinged between the lifting plate 4 and the top plate 11. A central connecting rod 8 is hinged to both sides of the carrier plate 24. The crossbeam... The internal rotating part 7 is equipped with a support sleeve 9. One end of the middle connecting rod 8 slides through the support sleeve 9 and is fitted with a spring 13 through the limiting plate 10. One end of the limiting plate 10 is equipped with a limiting nut 12. One end of the middle connecting rod 8 is equipped with an external thread, and the limiting nut 12 is equipped with an internal thread that is connected to the external thread. The spring 13 can provide elastic force to reset when the hydraulic cylinder 3 drives the lower pressure plate to move down, which can relieve the pressure of the hydraulic cylinder 3 and improve the service life of the hydraulic cylinder 3. At the same time, it can also improve the stability of the transmission between the lower pressure plate 5, multiple carrier plates 24 and the top plate 11.

[0017] like Figure 1 and Figure 2 As shown, a detachable hot pressing template 16 is also provided in the through hole 17 inside the lower pressure plate 5, the top plate 11 and the carrier plate 24. The hot pressing template 16 has an electric heating layer in the middle, which makes it easy to replace the hot pressing template 16 of different models for hot pressing molding.

[0018] like Figure 3 and Figure 4 As shown, in order to improve the stability of the hot-press template 16 during installation and fixation, two limiting grooves 18 are provided inside one end of the lower pressure plate 5, the top plate 11, and the carrier plate 24. Limiting sliders 19 are provided in the two limiting grooves 18 through the opposing threads of the screw rod 21. A limiting block 20 is provided on one side of the limiting slider 19. Locking grooves 15 are provided on both sides of the hot-press template 16 to engage with the limiting block 20 laterally. Two opposite external threads are provided on the outer sides of both ends of the screw rod 21. An adjusting handle 22 and a locking bolt 23 are provided at one end of the screw rod 21, so that the two limiting sliders 19 and the two limiting blocks 20 can be adjusted to move in opposite directions by rotating the screw rod 21. When the two limiting blocks 20 are respectively engaged in the locking grooves 15 on the outer wall of the hot-press template 16, the hot-press template 16 engaged in the lower pressure plate 5, the top plate 11, and the carrier plate 24 can be locked. Moreover, the hot-press template 16 has high stability during installation and fixation, and is convenient and quick to disassemble and assemble.

[0019] like Figure 3 As shown, the limiting slider 19 and the limiting block 20 are also integrated into an L-shaped support block. When not in use, the limiting block 20 can be completely retracted into the limiting groove 18, which facilitates the improvement of the flexibility of the limiting block 20 in use.

[0020] The working principle and usage process of this utility model are as follows: During use, a support sleeve 9 is provided inside the crossbeam 7 by rotation. One end of the central connecting rod 8 slides through the support sleeve 9 and is fitted with a spring 13 through the limiting plate 10. A limiting nut 12 is provided at one end of the limiting plate 10. The spring 13 can provide elastic force to reset when the hydraulic cylinder 3 drives the lower pressure plate to move down, which can relieve the pressure of the hydraulic cylinder 3 and improve the service life of the hydraulic cylinder 3. At the same time, it can improve the stability of the transmission between the lower pressure plate 5, multiple carrier plates 24 and the top plate 11.

[0021] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A multi-layer hot press, comprising a base (1), characterized in that: The base (1) is provided with a lower pressure plate (5) via a hydraulic cylinder (3) and a lifting plate (4) on its upper side. The base (1) is provided with a top plate (11) via an upper frame (2) on its upper side. Multiple carrier plates (24) are provided at equal intervals between the lower pressure plate (5) and the top plate (11). A support beam (6) and a crossbeam (7) are hinged between the lifting plate (4) and the top plate (11). A middle connecting rod (8) is hinged on both sides of the carrier plate (24). A support sleeve (9) is provided inside the crossbeam (7). One end of the middle connecting rod (8) slides through the support sleeve (9) and is fitted with a spring (13) via a limiting plate (10). A limiting nut (12) is provided at one end of the limiting plate (10). A detachable hot-pressing template (16) is provided in the through hole (17) inside the lower pressure plate (5), the top plate (11) and the carrier plate (24).

2. A multi-layer hot press according to claim 1, characterized in that: The middle connecting rod (8) has an external thread on one side, and the limiting nut (12) has an internal thread that is threaded to the external thread.

3. A multi-layer hot press according to claim 1, characterized in that: The hydraulic cylinder (3) is provided in multiple ways, and one end of the hydraulic cylinder (3) is connected to an oil storage tank (14) through an oil supply pipe and an oil pump.

4. A multi-layer hot press according to claim 1, characterized in that: The lower pressure plate (5), the top plate (11) and the carrier plate (24) are provided with two limiting slide grooves (18) at one end, and the two limiting slide grooves (18) are provided with limiting sliders (19) threaded in opposite directions by a screw rod (21). A limiting block (20) is provided on one side of the limiting slider (19), and a locking groove (15) is provided on both sides of the hot pressing template (16) to engage with the limiting block (20) laterally.

5. A multi-layer hot press according to claim 4, characterized in that: The lead screw (21) has two opposite external threads on the outer sides at both ends, and one end of the lead screw (21) is provided with an adjustment handle (22) and a locking bolt (23).

6. A multi-layer hot press according to claim 4, characterized in that: The limiting slider (19) and the limiting block (20) are integrally configured as an L-shaped support block. When not in use, the limiting block (20) can be completely retracted into the limiting groove (18).

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