A hot pressing device for plywood production

Abstract

This utility model provides a hot pressing device for plywood production, relating to the field of plywood production technology. It includes: a housing; a support base inside the housing; a positioning seat on top of the support base for positioning the plywood; a hydraulic cylinder on the upper side of the inner wall of the housing; and a hot pressing plate located above the positioning seat at the bottom of the output shaft of the hydraulic cylinder. Connecting plates symmetrically arranged on the top of the hot pressing plate on both sides of the hydraulic cylinder are provided, with guide posts at the bottom of the connecting plates. Guide holes matching the guide posts are opened at positions corresponding to the guide posts on the top of the support base. A buffer spring is sleeved on the side wall of the guide post between the connecting plate and the support base. A limiting rod for limiting the movement of the hot pressing plate is provided on the lower side of the inner wall of the guide hole. This utility model has a reasonable structure, good support and limiting effect, and good damage prevention effect.

Description

Technical Field

[0001] This utility model relates to the field of plywood production technology, specifically to a hot pressing device for plywood production. Background Technology

[0002] Plywood is a type of engineered wood panel made primarily from wood. It is produced by rotary cutting logs into veneers or slicing timber into thin sheets, which are then glued together with adhesives. Hot pressing equipment is required during the production of plywood.

[0003] In existing technologies, hot pressing devices typically use a hot press plate to directly press plywood, with the pressing stroke largely controlled by displacement sensors. However, when these sensors are damaged or malfunctioning, the hot press plate may lose its limit and exceed its design range. Continuous pressing will subject the plywood to pressure exceeding its design limits, damaging the inter-veneer adhesive structure, causing delamination or localized crushing, and reducing production quality. Therefore, a hot pressing device for plywood production is needed to address these problems. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a hot pressing device for plywood production to solve the problems mentioned in the background art. This utility model has a reasonable structure, good support and limiting effect, and good damage prevention effect.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: a hot pressing device for plywood production, comprising:

[0006] The housing has a support base inside, and a positioning seat for positioning the plywood is provided on the top of the support base. A hydraulic cylinder is provided on the upper side of the inner wall of the housing, and a hot press plate located above the positioning seat is provided at the bottom of the output shaft of the hydraulic cylinder.

[0007] The hot press plate is symmetrically provided with connecting plates on both sides of the hydraulic cylinder at the top. The bottom of the connecting plate is provided with a guide post. The top of the support base is provided with a guide hole that matches the guide post at the corresponding position. The side wall of the guide post is fitted with a buffer spring located between the connecting plate and the support base. The lower side of the inner wall of the guide hole is provided with a limiting rod for limiting the hot press plate.

[0008] Furthermore, the support base has a threaded hole located below the guide hole and communicating with the guide hole;

[0009] The limiting rod includes a threaded post disposed inside the threaded hole, and a limiting disc located inside the guide hole is provided on the top of the threaded post.

[0010] Furthermore, a hexagonal groove is provided on the top of the limiting plate, and an observation groove communicating with the guide hole is provided on the side wall of the support base.

[0011] Furthermore, a scale line is provided on the side wall of the support base at the position corresponding to the observation slot.

[0012] Furthermore, the support base is provided with an ejection assembly for ejecting the hot-pressed plywood out of the positioning base;

[0013] The ejection assembly includes a mounting groove formed in the side wall of the support base, and an ejection electric push rod is provided inside the mounting groove. The telescopic shaft of the ejection electric push rod is provided with a top plate located on the lower side of the inner wall of the positioning base.

[0014] Furthermore, the sidewall of the limiting disc matches the inner wall of the guide hole.

[0015] Furthermore, the limiting plate and the top of the threaded column are provided with pressing holes that communicate with the hexagonal groove. A return spring is provided inside the pressing hole. The threaded column is provided with a mounting hole located below and communicating with the pressing hole. A pressure sensor is provided inside the mounting hole. A pressing rod for pressing the return spring and located inside the mounting hole is provided inside the pressing hole. A PLC controller is provided on the housing. The PLC controller is connected to the pressure sensor and the hydraulic cylinder respectively. The PLC controller is connected to an external display screen.

[0016] The beneficial effects achieved by the present invention using the above structure are as follows:

[0017] This invention utilizes a hydraulic cylinder to drive a hot press plate downwards. The hot press plate then moves a guide post on a connecting plate downwards along a guide hole. This downward movement of the connecting plate presses down on a buffer spring on the side wall of the guide post, compressing the spring and providing cushioning for the hot press plate. When the bottom of the guide post contacts the top of the limiting rod, the limiting rod limits the guide post and the hot press plate, preventing it from exceeding its limit and damaging the plywood. This enhances the supporting and limiting effect, prevents damage to the plywood due to insufficient limiting on the hot press plate, provides good damage prevention, and improves production quality. Attached Figure Description

[0018] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0019] Figure 1 This is a perspective view of a hot pressing device for plywood production according to an embodiment of the present invention;

[0020] Figure 2This is a front sectional view of a hot pressing device for plywood production according to an embodiment of the present invention;

[0021] Figure 3 This is a cross-sectional perspective view of a hot pressing device for plywood production according to an embodiment of the present invention;

[0022] Figure 4 This is a perspective view of the connection between the connecting plate and the limiting rod in a hot pressing device for plywood production according to an embodiment of the present invention.

[0023] Figure 5 This is a cross-sectional perspective view of a hot pressing device for plywood production according to an embodiment of the present invention.

[0024] Figure 6 According to an embodiment of the present utility model Figure 2 Enlarged view of A in the middle;

[0025] In the diagram: 1. Housing; 2. Support base; 21. Guide hole; 22. Threaded hole; 3. Guide post; 4. Buffer spring; 5. Connecting plate; 6. Hot press plate; 7. Hydraulic cylinder; 8. Positioning seat; 9. Observation slot; 10. Limiting rod; 101. Limiting plate; 102. Hexagonal slot; 103. Threaded post; 11. Scale line; 12. Ejection assembly; 121. Ejection electric push rod; 122. Top plate; 123. Mounting slot; 13. Pressing rod; 14. Pressing hole; 15. Return spring; 16. Mounting hole; 17. Pressure sensor. Detailed Implementation

[0026] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0027] like Figure 1 As shown, this utility model provides a technical solution: a hot pressing device for plywood production, comprising:

[0028] The housing 1 has a support base 2 inside, and a positioning seat 8 for positioning the plywood is provided on the top of the support base 2. A hydraulic cylinder 7 is provided on the upper side of the inner wall of the housing 1, and a hot press plate 6 located above the positioning seat 8 is provided at the bottom of the output shaft of the hydraulic cylinder 7.

[0029] The top of the hot press plate 6 is symmetrically provided with connecting plates 5 on both sides of the hydraulic cylinder 7. The bottom of the connecting plate 5 is provided with a guide post 3. The top of the support base 2 is provided with a guide hole 21 that matches the guide post 3. The side wall of the guide post 3 is fitted with a buffer spring 4 located between the connecting plate 5 and the support base 2. The lower side of the inner wall of the guide hole 21 is provided with a limiting rod 10 for limiting the hot press plate 6. This design uses a hydraulic cylinder 7 to move a hot press plate 6 downwards to perform a hot pressing operation on the plywood inside the positioning seat 8. When the hot press plate 6 moves downwards, it drives the guide post 3 on the connecting plate 5 to move downwards along the guide hole 21. The downward movement of the connecting plate 5 presses the buffer spring 4 on the side wall of the guide post 3, and the buffer spring 4 is in a compressed state, which buffers the hot press plate 6. When the bottom of the guide post 3 contacts the top of the limiting rod 10, the limiting rod 10 limits the guide post 3 and limits the hot press plate 6, enhancing the support and limiting effect, avoiding damage to the plywood due to the lack of limiting of the hot press plate 6, and improving the damage prevention effect and production quality. The connecting plate 5 is symmetrically arranged, and the guide post 3 and the limiting rod 10 are also symmetrically arranged to ensure the stability of the limiting of the hot press plate 6.

[0030] Reference Figure 2 and Figure 3 The support base 2 has a threaded hole 22 located below the guide hole 21 and connected to the guide hole 21 inside;

[0031] The limiting rod 10 includes a threaded post 103 disposed inside the threaded hole 22, and a limiting plate 101 located inside the guide hole 21 at the top of the threaded post 103. This design connects the threaded post 103 to the threaded hole 22, facilitating the adjustment of the height of the limiting plate 101, thereby adjusting the limiting height of the guide post 3 and the limiting height of the hot press plate 6, adapting to the hot pressing of plywood of different thicknesses.

[0032] Reference Figure 3 , Figure 4 and Figure 5 The top of the limiting plate 101 has a hexagonal groove 102, and the side wall of the support base 2 has an observation groove 9 that communicates with the guide hole 21. This design allows for easy connection to an external wrench via the hexagonal groove 102, which applies force to the limiting plate 101, causing the threaded post 103 to rotate inside the threaded hole 22, facilitating the adjustment of the height of the limiting plate 101. The observation groove 9 allows for easy observation of the adjusted height of the limiting plate 101, ensuring that the tops of the symmetrically arranged limiting plates 101 are flush. When the hexagonal groove 102 is connected to an external wrench, the guide post 3 disengages from the guide hole 21, and the buffer spring 4 can be removed from the side wall of the guide post 3. The side of the observation groove 9 closest to the guide hole 21 is arc-shaped and flush with the inner wall of the guide hole 21.

[0033] Reference Figure 1 and Figure 5A scale line 11 is provided on the side wall of the support base 2 at a position corresponding to the observation slot 9. This design allows for easy viewing of the position and height of the top of the limit plate 101 through the scale line 11, ensuring that the tops of the symmetrically arranged limit plates 101 are flush.

[0034] Reference Figure 1 and Figure 2 The support base 2 is equipped with an ejection assembly 12 for ejecting the hot-pressed plywood out of the positioning base 8;

[0035] The ejector assembly 12 includes a mounting groove 123 formed in the side wall of the support base 2. An ejector electric push rod 121 is disposed inside the mounting groove 123. A top plate 122 is disposed on the telescopic shaft of the ejector electric push rod 121, located on the lower side of the inner wall of the positioning base 8. This design uses the operation of the ejector electric push rod 121 in the ejector assembly 12 to drive the top plate 122 to move vertically, thereby ejecting the plywood that has been heat-pressed inside the positioning base 8.

[0036] Reference Figure 2 The side wall of the limiting plate 101 matches the inner wall of the guide hole 21, improving the rationality of the design.

[0037] Reference Figure 6 The limit plate 101 and the threaded column 103 have a pressing hole 14 at the top that communicates with the hexagonal groove 102. A return spring 15 is installed inside the pressing hole 14. The threaded column 103 has a mounting hole 16 located below the pressing hole 14 and communicating with the pressing hole 14. A pressure sensor 17 is installed inside the mounting hole 16. A pressing rod 13 for pressing the return spring 15 and located inside the mounting hole 16 is installed inside the pressing hole 14. A PLC controller is installed on the housing 1. The PLC controller is connected to the pressure sensor 17 and the hydraulic cylinder 7 respectively. The PLC controller is connected to an external display screen. When the guide post 3 contacts the top of the limiting plate 101, the guide post 3 is limited. At the same time, the guide post 3 pushes the pressing rod 13 downward to contact the detection probe of the pressure sensor 17. This indicates that the displacement sensor connected to the hydraulic cylinder 7 is damaged or malfunctioning. The pressure sensor 17 sends a signal to the PLC controller. The PLC controller receives the signal and controls the hydraulic cylinder 7 to stop moving downward. The signal is also sent to the display screen connected to the PLC controller, which facilitates observation of the displacement sensor damage or malfunction. This prevents the hot press plate 6 from exceeding the limit position and causing damage to the plywood, thus improving production quality.

[0038] Reference Figures 1-5As an embodiment of this utility model: when plywood needs to be hot-pressed, the operator drives the hot pressing plate 6 downward by operating the hydraulic cylinder 7. The hot pressing plate 6 drives the guide post 3 on the connecting plate 5 to move downward along the guide hole 21. The downward movement of the connecting plate 5 presses the buffer spring 4 on the side wall of the guide post 3. The buffer spring 4 is in a compressed state, which plays a buffering role on the hot pressing plate 6. When the bottom of the guide post 3 contacts the top of the limiting rod 10, the limiting rod 10 plays a limiting role on the guide post 3, which limits the hot pressing plate 6, enhances the support and limiting effect, avoids damage to the plywood due to lack of limiting of the hot pressing plate 6, has a good anti-damage effect, and improves production quality. The downward movement of the hot pressing plate 6 performs hot pressing operation on the plywood inside the positioning seat 8, which improves the practicality of this utility model.

[0039] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0040] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A hot pressing device for plywood production, comprising: The housing (1) has a support seat (2) inside, and a positioning seat (8) for positioning the plywood is provided on the top of the support seat (2). A hydraulic cylinder (7) is provided on the upper side of the inner wall of the housing (1). A hot press plate (6) located above the positioning seat (8) is provided at the bottom of the output shaft of the hydraulic cylinder (7). Its features are: The hot press plate (6) is symmetrically provided with connecting plates (5) on both sides of the hydraulic cylinder (7) at the top. The bottom of the connecting plate (5) is provided with a guide post (3). The top of the support base (2) is provided with a guide hole (21) that matches the guide post (3) at the position corresponding to the guide post (3). The side wall of the guide post (3) is fitted with a buffer spring (4) located between the connecting plate (5) and the support base (2). The lower side of the inner wall of the guide hole (21) is provided with a limiting rod (10) for limiting the hot press plate (6).

2. The hot press device for plywood production according to claim 1, wherein The support base (2) has a threaded hole (22) located below the guide hole (21) and connected to the guide hole (21). The limiting rod (10) includes a threaded post (103) disposed inside the threaded hole (22), and the top of the threaded post (103) is provided with a limiting plate (101) located inside the guide hole (21).

3. The hot press device for plywood production according to claim 2, wherein The top of the limiting plate (101) is provided with a hexagonal groove (102), and the side wall of the support base (2) is provided with an observation groove (9) that communicates with the guide hole (21).

4. The hot press device for plywood production according to claim 3, wherein The support base (2) has a scale line (11) at the position corresponding to the observation groove (9) on its side wall.

5. The hot press apparatus for plywood production according to claim 1, wherein The support base (2) is provided with an ejection assembly (12) for ejecting the hot-pressed plywood out of the positioning base (8). The ejection assembly (12) includes a mounting groove (123) formed on the side wall of the support base (2), and an ejection electric push rod (121) is provided inside the mounting groove (123). The telescopic shaft of the ejection electric push rod (121) is provided with a top plate (122) located on the lower side of the inner wall of the positioning base (8).

6. The hot press apparatus for plywood production according to claim 2, wherein The side wall of the limiting plate (101) matches the inner wall of the guide hole (21).

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