A hot-press forming die for a bamboo fiber molded tray

Abstract

The utility model discloses a kind of hot-press forming mould of bamboo fiber mould pressing tray, it is related to bamboo fiber product processing equipment technical field, the mould includes main mould, auxiliary mould and the ejection mechanism being set in the inside of main mould, ejection mechanism includes ejection table, sliding column, moving platform, first spring, guide column and sliding table, the sliding column and guide column are all equipped with mutually matched inclined plane, further include extrusion ring and second spring linked with sliding column, when mould closes, auxiliary mould extrusion ejection table, sliding column is moved, through inclined plane cooperation push guide column and moving platform, to compress first spring and stretch second spring and store energy, after mould opening, two springs are rebounded simultaneously.The utility model stores energy for demolding process using mould closing force, realizes automatic demolding without additional power source, not only simplifies equipment structure, reduces energy consumption and cost, and effectively improves production efficiency and product yield.

Description

Technical Field

[0001] This utility model relates to the technical field of bamboo fiber product processing equipment, and in particular to a hot pressing mold for bamboo fiber molded trays. Background Technology

[0002] Bamboo fiber, as an environmentally friendly material, is widely used in the production of disposable tableware, packaging trays and other products. Its main processing method is thermoforming, which involves pressing bamboo fiber raw materials into a preset shape under high temperature and high pressure using a special mold.

[0003] After the bamboo fiber molded pallet is hot-pressed, the molded pallet is removed from the mold cavity, which is the demolding process. This is an essential step in the entire production process, and its efficiency and reliability directly affect the final production quality and cost.

[0004] In existing technologies, demolding operations are typically carried out in two ways. One is to rely on manual tools to pry or remove the parts. This method is not only labor-intensive and inefficient, but also prone to deformation or damage to the still unstable hot-pressed parts during demolding due to the difficulty in controlling the demolding force applied by the manual labor, thus reducing the product yield. The other method is to equip the mold with an ejection mechanism driven by a cylinder or hydraulic cylinder. Although this achieves automation, this solution requires external air or hydraulic power, making the structure of the entire equipment complex. This not only increases manufacturing costs and the difficulty of later maintenance, but also brings additional energy consumption.

[0005] Therefore, this utility model proposes a hot pressing mold for bamboo fiber molded trays to overcome the shortcomings of the prior art. Utility Model Content

[0006] In view of the problems existing in the hot pressing mold of bamboo fiber molded trays, such as the demolding structure relying on external force, low degree of automation, easy damage to molded parts, complex equipment structure and high energy consumption, this utility model aims to provide a hot pressing mold for bamboo fiber molded trays with an improved structure that can effectively solve the above problems.

[0007] This utility model provides a hot pressing mold for bamboo fiber molded trays, including a support platform, a main mold fixed on the support platform, an auxiliary mold that can be opened and closed with the main mold, and an ejection mechanism disposed inside the main mold. The ejection mechanism includes an ejection platform, a sliding column whose one end is fixedly connected to the ejection platform, a movable platform slidably disposed inside the main mold, a first spring whose two ends are respectively connected to the inner wall of the main mold and the movable platform, a guide column disposed in an inclined manner, and a sliding platform fixed inside the main mold.

[0008] The sliding column has an inclined surface at one end, and the guide column also has an inclined surface at one end that matches the inclined surface of the sliding column. This structure forms a wedge-shaped transmission fit.

[0009] Furthermore, the guide post slides through the sliding table and slides inside the moving table under the guidance of the sliding table. This structural combination allows the pressure on the ejector plate to be converted into a lateral push on the guide post through the downward movement of the sliding post and the sliding contact of the two inclined surfaces when the auxiliary mold and the main mold are closed. This drives the moving table to slide and compress the first spring, thereby storing energy and providing power for the subsequent automatic demolding action.

[0010] Preferably, the ejection mechanism further includes a compression ring and a second spring. The compression ring is fixed to the outer wall of the sliding column, and the second spring is sleeved on the outside of the sliding column, with its two ends connected to the inner wall of the main mold and the compression ring, respectively. This dual-spring structure design can simultaneously compress the first spring and stretch the second spring when the sliding column is pressed down, so as to store energy together and provide stronger demolding rebound force.

[0011] Preferably, the inclined surface of the sliding column is the first inclined surface, and the inclined surface of the guide column is the second inclined surface. The first inclined surface and the second inclined surface form a wedge-shaped transmission structure that accurately converts vertical motion into lateral motion through sliding contact.

[0012] Preferably, a guide groove is provided on the moving platform, and the main body of the guide column is slidably disposed in the guide groove, thereby providing a stable trajectory constraint for the movement of the guide column and ensuring the reliability of force transmission.

[0013] Preferably, the mold further includes a mold closing mechanism, which includes an electric push rod fixed to the support platform, a first connecting column connected to the output end of the electric push rod, a first vertical connecting rod and a second vertical connecting rod with one end rotatably connected to the first connecting column, and a second connecting column rotatably connected to the other end of the first vertical connecting rod and the second vertical connecting rod respectively. These components together constitute the power input and primary transmission system for automatic opening and closing.

[0014] Preferably, the mold closing mechanism further includes a first connecting platform fixed on the auxiliary mold, and a first transverse connecting rod and a second transverse connecting rod rotatably connected at both ends to the first connecting platform and the second connecting column, respectively. Through this set of connecting rods, the motion of the mold closing mechanism is directly transmitted to the auxiliary mold to realize its reciprocating movement.

[0015] Preferably, the mold further includes a second connecting platform fixed on the support platform, and the mold closing mechanism further includes a third transverse connecting rod and a fourth transverse connecting rod that are rotatably connected at both ends to the second connecting platform and the second connecting column, respectively. This set of connecting rods connects the motion mechanism to the fixed base, forming a complete closed-loop connecting rod system, which ensures the determinism and stability of the motion.

[0016] Preferably, the mold also includes a guide rod, one end of which is fixed to the main mold, and the auxiliary mold has a through hole that slides with the guide rod and slides along the length of the guide rod, ensuring that the movement trajectory of the auxiliary mold is straight and accurately aligned during the opening and closing process.

[0017] This utility model has the following beneficial effects:

[0018] 1. This utility model solves the problems of difficult demolding of molded trays, reliance on manual or external assistance, easy product damage, and low degree of automation in the prior art by setting up an ejection mechanism that stores energy using the mold closing force and automatically releases energy after the mold opens. The mechanism contains mutually cooperating sliding columns, guide columns, and spring assemblies. It achieves the technical effect of realizing automatic product demolding, improving production efficiency and product yield.

[0019] 2. This utility model, through a cleverly designed ejection mechanism, utilizes a sloping plane linkage structure to compress and stretch springs to store potential energy during the mold closing process. This eliminates the need for an additional power source for the demolding process, solving the problems of complex structure, additional energy consumption, and high cost of existing automated demolding devices. It achieves the technical effects of simplifying the overall equipment structure, saving energy, and reducing manufacturing costs.

[0020] 3. This utility model solves the problems of low efficiency and unstable mold closing accuracy in the prior art by setting up a complex linkage mold closing mechanism driven by an electric push rod and using a guide rod to guide the movement of the auxiliary mold. It achieves the technical effect of realizing the automation, speed and smooth opening and closing of the mold, reducing the labor intensity of workers and ensuring the stability of the production process. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of a hot pressing mold for a bamboo fiber molded tray proposed in this utility model;

[0022] Figure 2 This is a schematic diagram of the first connecting column part of the hot pressing mold for a bamboo fiber molded tray proposed in this utility model;

[0023] Figure 3 This is a schematic diagram of the ejector plate of a hot pressing mold for a bamboo fiber molded tray proposed in this utility model.

[0024] Figure 4 This is a schematic diagram of the auxiliary mold part of the hot pressing mold for a bamboo fiber molded tray proposed in this utility model.

[0025] Legend:

[0026] 1. Support platform; 2. Auxiliary mold; 3. Main mold; 4. Mold closing mechanism; 401. Guide rod; 402. Electric push rod; 403. First connecting column; 404. First vertical connecting rod; 405. Second vertical connecting rod; 406. First connecting platform; 407. Second connecting platform; 408. First horizontal connecting rod; 409. Second connecting column; 410. Second horizontal connecting rod; 411. Third horizontal connecting rod; 412. Fourth horizontal connecting rod; 5. Ejection mechanism; 501. Ejection platform; 502. Sliding column; 503. Moving platform; 504. First spring; 505. Guide column; 506. Sliding platform; 507. Second spring; 508. Extrusion ring. Detailed Implementation

[0027] 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.

[0028] Please refer to Figures 1 to 4 This utility model provides a hot pressing mold for bamboo fiber molded trays, which aims to solve the problems of existing demolding structures relying on external force, low automation, and easy damage to molded parts.

[0029] like Figure 1 As shown, the hot pressing mold for the bamboo fiber molded tray includes a support platform 1, a main mold 3 fixed on the support platform 1, and an auxiliary mold 2 that can be opened and closed to fit the main mold 3. The mold also includes an ejection mechanism 5 disposed inside the main mold 3. The ejection mechanism 5 has an ejection platform 501, which is configured to slide along the depth direction of the main mold 3 when the auxiliary mold 2 and the main mold 3 are closed, thereby triggering a series of mechanical linkages to prepare and store energy for the subsequent automatic demolding process.

[0030] Specifically, such as Figure 3As shown, the ejection mechanism 5 also includes a sliding column 502, a moving table 503, a first spring 504, a guide column 505, and a sliding table 506. One end of the sliding column 502 is fixedly connected to the ejection platform 501 to transmit motion synchronously. The other end of the sliding column 502 is provided with an inclined surface, which is the first inclined surface. The moving table 503 is slidably disposed inside the main mold 3. The two ends of the first spring 504 are respectively connected to the inner wall of the main mold 3 and the moving table 503 to provide a restoring elastic force. One end of the guide column 505 is provided with a second inclined surface that cooperates with the first inclined surface of the sliding column 502. The guide column 505 is arranged in an inclined shape. The sliding table 506 is fixed inside the main mold 3. The guide column 505 slides through the sliding table 506 and is guided by the sliding table 506. The sliding column 502 slides inside the moving table 503, which has a guide groove. The main body of the guide column 505 is slidably disposed in the guide groove. The first inclined surface and the second inclined surface slide in contact. Through this inclined surface cooperation, the vertical movement of the sliding column 502 can be converted into the lateral movement component of the guide column 505, thereby pushing the moving table 503 to slide and compressing the first spring 504. In order to further enhance the demolding force, the ejection mechanism 5 also includes a compression ring 508 and a second spring 507. The compression ring 508 is fixed to the outer wall of the sliding column 502, and the second spring 507 is sleeved on the outside of the sliding column 502, and its two ends are respectively connected to the inner wall of the main mold 3 and the compression ring 508. When the sliding column 502 is pressed down, the second spring 507 is stretched, which also stores elastic potential energy.

[0031] The mold closing mechanism 4 includes an electric push rod 402, a first connecting column 403, a first vertical connecting rod 404, a second vertical connecting rod 405, and a second connecting column 409. The electric push rod 402 is fixed on the support platform 1 as a power source. The first connecting column 403 is connected to the output end of the electric push rod 402. One end of the first vertical connecting rod 404 and the second vertical connecting rod 405 are rotatably connected to the first connecting column 403. The second connecting column 409 is rotatably connected to the other end of the first vertical connecting rod 404 and the second vertical connecting rod 405, respectively.

[0032] Meanwhile, the mold closing mechanism 4 also includes a first connecting platform 406 fixedly mounted on the auxiliary mold 2, as well as a first transverse connecting rod 408 and a second transverse connecting rod 410. One end of the first transverse connecting rod 408 and the second transverse connecting rod 410 is rotatably connected to the first connecting platform 406, and the other end is rotatably connected to the second connecting post 409. In addition, the mold also includes a second connecting platform 407 fixed on the support platform 1. The mold closing mechanism 4 also includes a third transverse connecting rod 411 and a fourth transverse connecting rod 412. One end of the third transverse connecting rod 411 and the fourth transverse connecting rod 412 is rotatably connected to the second connecting platform 407, and the other end is rotatably connected to the second connecting post 409. Through this series of connecting rods and rotatable connections, when the electric push rod 402 moves, it can drive the entire linkage system to produce precise linkage, and finally drive the auxiliary mold 2 to achieve smooth reciprocating motion through the first connecting platform 406.

[0033] To ensure the stability and guidance of the movement of the auxiliary mold 2, the mold also includes a guide rod 401. One end of the guide rod 401 is fixed to the main mold 3. The auxiliary mold 2 has a through hole that slides with the guide rod 401. The auxiliary mold 2 slides along the length of the guide rod 401. This guide rail-type mating structure ensures the high stability and alignment accuracy of the auxiliary mold 2 during the opening and closing process.

[0034] Based on the above embodiments, the present invention may further include the following preferred technical solutions:

[0035] As a preferred embodiment, in order to enhance the springback force of the ejection mechanism 5 during demolding and optimize its structural layout, please refer to... Figure 3 The ejection mechanism 5 also includes a compression ring 508 and a second spring 507. The compression ring 508 is fixedly connected to the outer wall of the sliding column 502. The second spring 507 is sleeved on the outside of the sliding column 502, and its two ends are respectively connected to the inner wall of the main mold 3 and the compression ring 508. When the sliding column 502 moves downward under the action of the mold closing force, the second spring 507 is stretched, thereby storing energy together with the compressed first spring 504, and releasing it together when the mold opens, providing a more reliable ejection power.

[0036] As another preferred embodiment, to clarify the mechanical transmission relationship between the inclined planes, please refer to... Figure 3 The inclined surface of the sliding column 502 is the first inclined surface, and the inclined surface of the guide column 505 is the second inclined surface. In the working state, the first inclined surface and the second inclined surface slide in contact. Through the cooperation of this wedge structure, the vertical displacement of the sliding column 502 is accurately converted into the lateral thrust on the guide column 505.

[0037] As another preferred embodiment, in order to provide precise constraints on the sliding trajectory of the guide post 505, please refer to... Figure 3 The moving platform 503 is provided with a guide groove, and the main body of the guide column 505 is slidably disposed in the guide groove, which ensures the stability of the guide column 505 when it is subjected to force and ensures the smooth and reliable transmission of force inside the entire ejection mechanism 5.

[0038] As another preferred embodiment, to achieve the power input and initial transmission of the mold clamping mechanism 4, please refer to... Figure 2 The electric push rod 402 is fixed on the support platform 1, and its output end is connected to the first connecting column 403, forming the power source and first-stage transmission link of the entire linkage system.

[0039] As another preferred embodiment, in order to transmit the motion of the mold clamping mechanism 4 to the auxiliary mold 2, please refer to... Figure 2 and Figure 4 The mold closing mechanism 4 also includes a first connecting platform 406 fixedly mounted on the auxiliary mold 2, a first transverse connecting rod 408 and a second transverse connecting rod 410. One end of the first transverse connecting rod 408 and the second transverse connecting rod 410 is rotatably connected to the first connecting platform 406, and the other end is rotatably connected to the second connecting column 409, thus forming a direct execution mechanism for driving the movement of the auxiliary mold 2.

[0040] As another preferred embodiment, in order to establish a connection between the movement of the mold clamping mechanism 4 and the fixed support platform 1 to form a complete closed linkage system, please refer to... Figure 1 and Figure 2 The mold also includes a second connecting platform 407 fixed on the support platform 1. The mold closing mechanism 4 also includes a third transverse connecting rod 411 and a fourth transverse connecting rod 412. One end of the third transverse connecting rod 411 and the fourth transverse connecting rod 412 is rotatably connected to the second connecting platform 407, and the other end is rotatably connected to the second connecting column 409.

[0041] As another preferred embodiment, to ensure high-precision guidance of the auxiliary mold 2 during reciprocating motion, please refer to... Figure 1 The mold also includes a guide rod 401, one end of which is fixed to the main mold 3. The auxiliary mold 2 has a through hole that slides with the guide rod 401. The auxiliary mold 2 slides along the length of the guide rod 401, thereby effectively preventing it from shifting or shaking during movement.

[0042] The working principle of the hot pressing mold for bamboo fiber molded trays of this utility model is as follows:

[0043] When it is necessary to open the mold to fill bamboo fiber raw materials, the electric push rod 402 in the mold closing mechanism 4 is activated, and its output end retracts, pulling the first connecting column 403 to move. Then, through the first vertical connecting rod 404 and the second vertical connecting rod 405, the second connecting column 409 is rotated. The rotation of the second connecting column 409 simultaneously drives the linkage of the first horizontal connecting rod 408, the second horizontal connecting rod 410, the third horizontal connecting rod 411 and the fourth horizontal connecting rod 412. Finally, through the first connecting platform 406, the auxiliary mold 2 is pulled away from the main mold 3 along the guide rod 401, realizing the separation of the mold.

[0044] When the material is loaded and the mold needs to be closed for hot pressing, the output end of the electric push rod 402 extends and pushes the entire linkage system to move in the opposite direction, eventually causing the auxiliary mold 2 to approach and close the main mold 3. During the mold closing process of the auxiliary mold 2 and the main mold 3, the auxiliary mold 2 will squeeze the ejector plate 501 of the ejection mechanism 5. The ejector plate 501 drives the sliding column 502 to slide into the main mold 3. The inclined surface of the sliding column 502 contacts the inclined surface of the guide column 505 and generates relative sliding, forcing the guide column 505 to push the moving table 503 to slide under the guidance of the sliding table 506, thereby compressing the first spring 504. At the same time, the downward movement of the sliding column 502 also stretches the second spring 507 through the extrusion ring 508. Thus, both the first spring 504 and the second spring 507 have stored elastic potential energy for demolding.

[0045] Once the hot pressing is complete, the electric push rod 402 is activated again to separate the auxiliary mold 2 from the main mold 3. The pressure applied to the ejector plate 501 disappears instantly. The compressed first spring 504 and the stretched second spring 507 rebound simultaneously, acting together on the sliding column 502 and the moving table 503. Through the reverse linkage of the guide column 505 and the sliding table 506, the ejector plate 501 is finally driven to move upward rapidly, automatically ejecting the molded bamboo fiber molding tray from the cavity of the main mold 3, thus completing the entire automated production cycle.

[0046] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present 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 the present utility model should be included within the protection scope of the present utility model.

Claims

1. A hot pressing mold for a bamboo fiber molded tray, comprising a support platform (1), a main mold (3), an auxiliary mold (2), and an ejection mechanism (5), wherein the main mold (3) is fixed on the support platform (1), the auxiliary mold (2) is closably fitted to the main mold (3), and the ejection mechanism (5) is disposed inside the main mold (3), wherein the ejection mechanism (5) comprises an ejection platform (501), the ejection platform (501) being configured to slide along the depth direction of the main mold (3) when the auxiliary mold (2) and the main mold (3) are closed; Its features are, The ejection mechanism (5) further includes a sliding column (502), a moving platform (503), a first spring (504), a guide column (505), and a sliding platform (506). One end of the sliding column (502) is fixedly connected to the ejection platform (501), and the other end of the sliding column (502) is provided with an inclined surface. The moving platform (503) is slidably disposed inside the main mold (3). The two ends of the first spring (504) are respectively connected to the inner wall of the main mold (3) and the moving platform (503). One end of the guide column (505) is provided with an inclined surface that cooperates with the inclined surface of the sliding column (502) and is arranged in an inclined shape. The sliding platform (506) is fixed inside the main mold (3). The guide column (505) slides through the sliding platform (506) and slides inside the moving platform (503) under the guidance of the sliding platform (506).

2. The hot pressing mold for a bamboo fiber molded tray according to claim 1, characterized in that, The ejection mechanism (5) further includes a compression ring (508) and a second spring (507). The compression ring (508) is fixed to the outer wall of the sliding column (502), and the second spring (507) is sleeved on the outside of the sliding column (502), with its two ends respectively connected to the inner wall of the main mold (3) and the compression ring (508).

3. The hot pressing mold for a bamboo fiber molded tray according to claim 1, characterized in that, The inclined surface of the sliding column (502) is a first inclined surface, and the inclined surface of the guide column (505) is a second inclined surface. The first inclined surface and the second inclined surface are in sliding contact.

4. The hot pressing mold for a bamboo fiber molded tray according to claim 1, characterized in that, The movable platform (503) is provided with a guide groove, and the main body of the guide column (505) is slidably disposed in the guide groove.

5. The hot pressing mold for a bamboo fiber molded tray according to claim 1, characterized in that, It also includes a mold closing mechanism (4), which is used to drive the auxiliary mold (2) to reciprocate. The mold closing mechanism (4) includes an electric push rod (402), a first connecting column (403), a first vertical connecting rod (404), a second vertical connecting rod (405), and a second connecting column (409). The electric push rod (402) is fixed on the support platform (1). The first connecting column (403) is connected to the output end of the electric push rod (402). One end of the first vertical connecting rod (404) and the second vertical connecting rod (405) are rotatably connected to the first connecting column (403). The second connecting column (409) is rotatably connected to the other end of the first vertical connecting rod (404) and the second vertical connecting rod (405), respectively.

6. The hot pressing mold for a bamboo fiber molded tray according to claim 5, characterized in that, The mold closing mechanism (4) further includes a first connecting platform (406) fixedly disposed on the auxiliary mold (2), a first transverse connecting rod (408) and a second transverse connecting rod (410), one end of the first transverse connecting rod (408) and the second transverse connecting rod (410) being rotatably connected to the first connecting platform (406), and the other end being rotatably connected to the second connecting column (409).

7. The hot pressing mold for a bamboo fiber molded tray according to claim 5, characterized in that, It also includes a second connecting platform (407) fixed on the support platform (1), and the mold closing mechanism (4) also includes a third transverse connecting rod (411) and a fourth transverse connecting rod (412). One end of the third transverse connecting rod (411) and the fourth transverse connecting rod (412) is rotatably connected to the second connecting platform (407), and the other end is rotatably connected to the second connecting column (409).

8. The hot pressing mold for a bamboo fiber molded tray according to claim 1, characterized in that, It also includes a guide rod (401), one end of which is fixed to the main mold (3). The auxiliary mold (2) has a through hole that slides with the guide rod (401). The auxiliary mold (2) slides along the length of the guide rod (401).

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