Pressure reduction mechanism for supercritical fluid foaming

Abstract

The utility model discloses a pressure reducing mechanism for supercritical fluid foaming, and relates to the technical field of pressure reducing mechanisms. Comprising a case, a connecting cover is inserted into one side of the case, first inserting grooves are formed in one sides of the bottom end and the top end of the connecting cover, second inserting grooves are formed in one sides of the first inserting grooves, a plurality of fixing rods corresponding to the first inserting grooves in a one-to-one mode are fixed to the top end and the bottom end of the case, the fixing rods are matched with the first inserting grooves, and the fixing rods are inserted into the second inserting grooves. The sides, close to the first inserting grooves, of the fixing rods are rotationally connected with rotating shafts. By arranging the connecting cover, the rotating rod, the fixed rod, the rotating shaft, the first slot and the second slot, the rotating rod is rotated to a vertical state, so that the rotating rod and the fixed rod are aligned with the first slot, then the connecting cover is moved outwards and taken out, and internal equipment can be maintained; and the case is prevented from being easily disassembled due to damage of the internal equipment, and the internal equipment is replaced and maintained.

Description

Technical Field

[0001] This utility model relates to the technical field of pressure-reducing mechanisms, specifically a pressure-reducing mechanism for supercritical fluid foaming. Background Technology

[0002] Supercritical fluid foaming is a physical foaming molding technology. First, supercritical carbon dioxide or nitrogen, or other gases, are injected into a special plasticizing device. This allows the gas to fully and uniformly mix / diffuse with the molten raw material, forming a single-phase sol. This sol is then introduced into a mold cavity or extrusion die, causing a large pressure drop that leads to gas precipitation and the formation of numerous bubble nuclei. During the subsequent cooling and molding process, these bubble nuclei continuously grow and solidify, ultimately resulting in microporous foamed plastic products. An existing supercritical fluid foaming pressure-reducing device (Announcement No.: CN217293459U) has the following disadvantages in use:

[0003] During use, the piston pad and tension spring are installed inside the chassis. The piston pad disengages from the two buffer chambers to start the pressure reduction operation. However, when the inside of the chassis is damaged, it is inconvenient to disassemble the chassis and replace or repair the internal devices. Therefore, this patent proposes a pressure reduction mechanism for supercritical fluid foaming to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a pressure-reducing mechanism for supercritical fluid foaming to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a pressure-reducing mechanism for supercritical fluid foaming, comprising a housing, a connecting cover inserted into one side of the housing, a first slot provided on one side of the bottom and top of the connecting cover, a second slot provided on one side of the first slot, a plurality of fixing rods corresponding one-to-one with the first slots fixed at the top and bottom of the housing, the fixing rods being adapted to the first slots, the fixing rods being inserted into the second slots, a rotating shaft being rotatably connected to the side of the fixing rods near the first slots, a rotating rod being fixed to the outer wall of the rotating shaft, and the fixing rods and rotating rods respectively contacting the inner walls of the two sides of the second slots.

[0006] Preferably, a limiting component is fixed to the inner wall of the chassis, a piston is slidably connected inside the limiting component, a connecting rod is fixed to the side of the piston near the connecting cover, a mounting plate is fixed to the side of the connecting rod outside the limiting component, a hydraulic rod is installed on one side of the mounting plate, and the hydraulic rod is connected to one side of the inner wall of the connecting cover.

[0007] Preferably, a first fixing plate is fixed to one side of the mounting plate, a second fixing plate is fixed to the inner wall of one side of the connecting cover, and the hydraulic rod is fixed between the first fixing plate and the second fixing plate.

[0008] Preferably, a spring is fixed between the first fixing plate and the second fixing plate, and the spring is located on the outside of the hydraulic rod.

[0009] Preferably, a protective component is provided between the first fixing plate and the second fixing plate. The protective component includes a first protective sleeve fixed to one side of the first fixing plate, and a second protective sleeve fixed to the side of the second fixing plate near the first fixing plate. The first protective sleeve is slidably connected to the outer wall of the second protective sleeve.

[0010] Preferably, a plurality of first bolts are screwed between the first fixing plate and the mounting plate, and a plurality of second bolts are screwed between the second fixing plate and the connecting cover.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] By setting up a connecting cover, a rotating rod, a fixed rod, a rotating shaft, a first slot, and a second slot, the rotating rod is rotated to a vertical position so that the rotating rod and the fixed rod are aligned with the first slot. Then, the connecting cover is moved outward and removed, allowing for the maintenance of the internal equipment. This avoids the difficulty of disassembling the chassis due to damage to the internal equipment, and facilitates the replacement and repair of the internal equipment. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a top view of the present invention;

[0015] Figure 3 This utility model Figure 2 Enlarged view of the structure at point A in the middle;

[0016] Figure 4 This is a first sectional view of the present invention;

[0017] Figure 5 This is a schematic diagram of the structure of the present invention after the protective component has been removed, shown in the first sectional view.

[0018] In the diagram: 1. Chassis; 2. Connecting cover; 3. First slot; 4. Second slot; 5. Fixing rod; 6. Rotating rod; 7. Rotating shaft; 8. Limiting component; 9. Piston; 10. Connecting rod; 11. Mounting plate; 12. First fixing plate; 13. First protective sleeve; 14. Second protective sleeve; 15. Second fixing plate; 16. Hydraulic rod; 17. Spring. Detailed Implementation

[0019] 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.

[0020] Supercritical foaming molding is a physical foaming molding technology. First, supercritical carbon dioxide or nitrogen or other gases are injected into a special plasticizing device, so that the gas is fully and uniformly mixed / diffused with the molten raw material to form a single-phase mixed sol. Then, the sol is introduced into the mold cavity or extrusion die, causing a large pressure drop in the sol, which causes the gas to precipitate and form a large number of bubble nuclei. During the subsequent cooling and molding process, the bubble nuclei inside the sol continue to grow and form, and finally, microporous foamed plastic products are obtained. Supercritical fluid foaming molding mainly utilizes the large pressure difference generated during the extrusion of material sol to form bubble nuclei. Therefore, the pressure control of the material sol is crucial in this process. If the pressure of the material sol inside the equipment is too high, the pressure inside the equipment needs to be released in advance before production. However, as a high-pressure sol release device, the sol will be ejected during the pressure release, which will cause sol spraying and splashing. The pressure reducing mechanism for supercritical fluid foaming provided by this utility model can reduce the pressure to reduce the pollution and loss caused by sol spraying and avoid the hazards caused by sol splashing. In addition, the device can be disassembled to facilitate the maintenance of the internal equipment.

[0021] like Figures 1-5 As shown, this utility model provides a technical solution: a pressure reducing mechanism for supercritical fluid foaming, including a housing 1, a connecting cover 2 inserted into one side of the housing 1, a first slot 3 opened on one side of the bottom and top of the connecting cover 2, a second slot 4 opened on one side of the first slot 3, a plurality of fixing rods 5 corresponding one-to-one with the first slot 3 fixed at the top and bottom of the housing 1, the fixing rods 5 being adapted to the first slot 3, the fixing rods 5 being inserted into the second slot 4, a rotating shaft 7 being rotatably connected to the side of the fixing rods 5 near the first slot 3, a rotating rod 6 being fixed to the outer wall of the rotating shaft 7, and the fixing rods 5 and the rotating rods 6 respectively contacting the inner walls of the two sides of the second slot 4.

[0022] It should be noted that by rotating the rotating rod 6 to a vertical position so that the rotating rod 6 and the fixed rod 5 are aligned with the first slot 3, the connecting cover 2 is moved outward and removed, so that the internal equipment can be repaired.

[0023] like Figure 4 and Figure 5As shown, a limiting component 8 is fixed to the inner wall of the casing 1. A piston 9 is slidably connected inside the limiting component 8. A connecting rod 10 is fixed to the side of the piston 9 near the connecting cover 2. A mounting plate 11 is fixed to the side of the connecting rod 10 outside the limiting component 8. A hydraulic rod 16 is mounted on one side of the mounting plate 11 and is connected to one side of the inner wall of the connecting cover 2. A first fixing plate 12 is fixed to one side of the mounting plate 11, and a second fixing plate 15 is fixed to one side of the inner wall of the connecting cover 2. The hydraulic rod 16 is fixed between the first fixing plate 12 and the second fixing plate 15. First connecting plates are installed at both ends of the hydraulic rod 16. Multiple third bolts are screwed between the first connecting plate and the first fixing plate 12 and the second fixing plate 15. A spring 17 is fixed between the first fixing plate 12 and the second fixing plate 15, and the spring 17 is located outside the hydraulic rod 16.

[0024] It should be noted that by installing the piston 9, connecting rod 10, and hydraulic rod 16 on one side of the connecting cover 2, it is convenient to maintain these devices after the connecting cover 2 is removed. In addition, when the sol enters the housing 1, it pushes the piston 9 and connecting rod 10 to move within the limiting member 8. When the piston 9 moves out of the limiting member 8, the pressure is reduced, and the sol flows out slowly, avoiding solution splashing.

[0025] like Figure 4 As shown, a protective component is provided between the first fixing plate 12 and the second fixing plate 15. The protective component includes a first protective sleeve 13 fixed to one side of the first fixing plate 12, a second protective sleeve 14 fixed to the side of the second fixing plate 15 near the first fixing plate 12, and a second connecting plate fixed to the ends of both the first protective sleeve 13 and the second protective sleeve 14 that are away from each other. A fourth bolt is screwed between the second connecting plate and the first fixing plate 12 and the second fixing plate 15. The first protective sleeve 13 is slidably connected to the outer wall of the second protective sleeve 14. Multiple first bolts are screwed between the first fixing plate 12 and the mounting plate 11, and multiple second bolts are screwed between the second fixing plate 15 and the connecting cover 2.

[0026] It should be noted that the hydraulic rod 16 and spring 17 are protected by protective components. In addition, when it is necessary to remove the hydraulic rod 16, the hydraulic rod 16 can be removed from the mounting plate 11 and the connecting cover 2 by removing the first bolt and the second bolt on the first fixing plate 12 and the second fixing plate 15.

[0027] Working principle: When it is necessary to install the connecting cover 2 on one side of the chassis 1, the rotating rod 6 is rotated so that the rotating rod 6 coincides with the first slot 3. Then the connecting cover 2 is inserted into one side of the chassis 1. At this time, the rotating rod 6 and the fixing rod 5 are exactly located in the second slot 4. Then the rotating rod 6 is rotated so that the rotating rod 6 is offset from the first slot 3, and the rotating rod 6 and the fixing rod 5 respectively contact the inner walls of the two sides of the second slot 4, so that the connecting cover 2 is fixed to one side of the chassis 1.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended embodiments and their equivalents.

Claims

1. A pressure-reducing mechanism for supercritical fluid foaming, comprising a housing (1), characterized in that: A connecting cover (2) is inserted into one side of the chassis (1). A first slot (3) is provided on one side of the bottom and top of the connecting cover (2). A second slot (4) is provided on one side of the first slot (3). Multiple fixing rods (5) corresponding to the first slot (3) are fixed at the top and bottom of the chassis (1). The fixing rods (5) are adapted to the first slot (3). The fixing rods (5) are inserted into the second slot (4). A rotating shaft (7) is rotatably connected to the side of the fixing rod (5) near the first slot (3). A rotating rod (6) is fixed on the outer wall of the rotating shaft (7). The fixing rod (5) and the rotating rod (6) are respectively in contact with the inner walls of the two sides of the second slot (4).

2. The pressure-reducing mechanism for supercritical fluid foaming according to claim 1, characterized in that: The inner wall of the chassis (1) is fixed with a limiting member (8), and a piston (9) is slidably connected inside the limiting member (8). A connecting rod (10) is fixed on the side of the piston (9) near the connecting cover (2). A mounting plate (11) is fixed on the side of the connecting rod (10) outside the limiting member (8). A hydraulic rod (16) is installed on one side of the mounting plate (11). The hydraulic rod (16) is connected to the inner wall of one side of the connecting cover (2).

3. The pressure-reducing mechanism for supercritical fluid foaming according to claim 2, characterized in that: A first fixing plate (12) is fixed on one side of the mounting plate (11), a second fixing plate (15) is fixed on the inner wall of one side of the connecting cover (2), and a hydraulic rod (16) is fixed between the first fixing plate (12) and the second fixing plate (15).

4. The pressure-reducing mechanism for supercritical fluid foaming according to claim 3, characterized in that: A spring (17) is fixed between the first fixing plate (12) and the second fixing plate (15), and the spring (17) is located outside the hydraulic rod (16).

5. The pressure-reducing mechanism for supercritical fluid foaming according to claim 3, characterized in that: A protective component is provided between the first fixing plate (12) and the second fixing plate (15). The protective component includes a first protective sleeve (13) fixed to one side of the first fixing plate (12) and a second protective sleeve (14) fixed to the side of the second fixing plate (15) near the first fixing plate (12). The first protective sleeve (13) is slidably connected to the outer wall of the second protective sleeve (14).

6. The pressure-reducing mechanism for supercritical fluid foaming according to claim 3, characterized in that: Multiple first bolts are screwed between the first fixing plate (12) and the mounting plate (11), and multiple second bolts are screwed between the second fixing plate (15) and the connecting cover (2).

Images