A PC plastic modification reaction vessel for optimizing flame retardancy
By setting a feeding cylinder and a reaction cylinder in a PC plastic reaction vessel and using a stirring assembly to drive the feeding cylinder to rotate, the problem of uneven distribution of flame retardant is solved, and rapid mixing of flame retardant and PC plastic is achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- XIAMEN GUANYAN PLAS&CHEM MATERIALS TECH CO LTD
- Filing Date
- 2025-06-04
- Publication Date
- 2026-06-23
AI Technical Summary
The existing flame retardant is added in a fixed position in the PC plastic reaction vessel, resulting in uneven initial distribution and increasing the time required for the flame retardant to be fully mixed with the PC plastic.
A feeding cylinder is installed in the reaction vessel, with multiple dispersion holes at the bottom that are connected to the reaction cylinder. The feeding cylinder is rotatably connected to the reaction cylinder. The feeding cylinder is rotated by a stirring assembly, and the opening and closing of the dispersion holes is controlled by a sealing assembly to ensure uniform distribution of the flame retardant.
It improves the initial uniformity of flame retardant distribution in the reaction chamber and shortens the time required for the flame retardant to fully mix with PC plastic.
Smart Images
Figure CN224388766U_ABST
Abstract
Description
Technical Field
[0001] This utility model provides a PC plastic modification reaction vessel with optimized flame retardancy, belonging to the technical field of equipment for PC plastic modification. Background Technology
[0002] Polyurethane (PC) plastic is widely used in many fields such as electronics, automobiles, and aerospace due to its excellent properties such as high strength, high transparency, good heat resistance, and dimensional stability. However, PC plastic has relatively poor flame retardancy, posing certain safety hazards in some applications with high fire protection requirements. Therefore, flame retardant modification of PC plastic has become a key technology to improve its safety and expand its application range.
[0003] In the flame-retardant modification of PC plastic, a reaction vessel is typically used to mix the flame retardant with the PC plastic. A common reaction vessel is a reaction cylinder, which works by adding PC plastic into the cylinder and heating it to melt. Then, a flame retardant, such as a liquid vinyl-containing polysiloxane, is added. A stirring device is used to thoroughly mix the flame retardant with the molten PC plastic to achieve the desired flame-retardant modification.
[0004] Existing methods for adding flame retardants involve feeding the flame retardant into the reaction vessel through a fixed inlet. Because the flame retardant falls into the reaction vessel at a fixed position, its initial distribution is extremely uneven. The flame retardant concentrates in the area below the inlet, while the concentration is lower in other areas of the reaction vessel, resulting in a prolonged time required for thorough mixing of the flame retardant with the PC plastic. Therefore, designing a flame-retardant-optimized PC plastic modification reaction vessel that can solve the problem of uniform flame retardant addition and shorten the mixing time between the flame retardant and PC plastic has become a pressing technical problem for those skilled in the art. Utility Model Content
[0005] The technical problem this invention aims to solve is that the fixed position of the flame retardant leads to uneven initial distribution of the flame retardant in the reaction chamber, thereby increasing the time required for the flame retardant to be completely mixed with the PC plastic.
[0006] To address the aforementioned problems, the proposed technical solution is as follows: a modified PC plastic reaction vessel with optimized flame retardancy, comprising a reaction cylinder, wherein a stirring assembly is provided inside the reaction cylinder; and further comprising:
[0007] Feeding cylinder; the bottom of the feeding cylinder for storing flame retardant has several dispersion holes that communicate with the reaction cylinder, and the feeding cylinder and the reaction cylinder are rotatably connected; the feeding cylinder is provided with a sealing component that can close all the dispersion holes, and the sealing component is slidably disposed in the feeding cylinder; the upper end of the stirring component is fixedly connected to a connecting rod, and the connecting rod is fixedly connected to the feeding cylinder.
[0008] As an improvement, the stirring assembly includes a stirring motor, a rotating shaft, and stirring blades; the stirring motor is located at the bottom of the reaction cylinder, the rotating shaft is rotatably located inside the reaction cylinder, and the rotating shaft is fixedly connected to the output shaft of the stirring motor; a plurality of stirring blades are fixedly connected to the rotating shaft.
[0009] As an improvement, the lower end of the connecting rod is fixedly connected to the rotating shaft, and the upper end of the connecting rod is fixedly connected to the feeding cylinder.
[0010] As an improvement, the sealing assembly includes a sealing plate and a rod; the sealing plate, capable of sealing all dispersion holes, is slidably disposed inside the feeding cylinder, and the rod is fixedly connected to the bottom of the sealing plate; the rod is inserted into the dispersion hole, and the number of rods is the same as the number of dispersion holes; a sealing gasket is provided at the position below the sealing plate that contacts the dispersion hole.
[0011] As an improvement, a screw is rotatably connected inside the feeding cylinder, and a sealing plate is threadedly connected to the screw, with a gap between the sealing plate and the inner wall of the feeding cylinder; a limit rod is fixedly installed inside the feeding cylinder, and the sealing plate is slidably sleeved on the limit rod.
[0012] As an improvement, the feeding cylinder is provided with a feed inlet, and a screw plug is threaded into the feed inlet; the bottom of the reaction cylinder is connected to an outlet pipe, and a heating plate is provided on the inner wall of the reaction cylinder.
[0013] The beneficial effects of this utility model are:
[0014] 1. The bottom of the feeding cylinder has several dispersion holes that communicate with the reaction cylinder. Through these multiple dispersion holes, the dispersion range of the liquid flame retardant entering the reaction cylinder can be increased. At the same time, the feeding cylinder is rotatably connected to the reaction cylinder. When the feeding cylinder rotates, it can change the position of the dispersion holes, which greatly increases the application range of the flame retardant and improves the uniformity of the initial distribution of the flame retardant in the reaction cylinder, thereby reducing the time required for the flame retardant to be completely mixed with the PC plastic.
[0015] 2. A connecting rod is fixedly connected to the upper end of the mixing component, and the connecting rod is fixedly connected to the feeding cylinder; by setting the connecting rod, the rotation of the mixing component can drive the feeding cylinder to rotate. The structure is simple and there is no need to set an additional power component to drive the feeding cylinder to rotate. Attached Figure Description
[0016] Figure 1This is a perspective view of a PC plastic modified reaction vessel with optimized flame retardancy according to the present invention.
[0017] Figure 2 This is a perspective view of a modified PC plastic reaction vessel with optimized flame retardancy according to this utility model.
[0018] Figure 3 This is a cross-sectional view of the reaction vessel of a PC plastic modified reaction container with optimized flame retardancy according to this utility model.
[0019] Figure 4 This is a cross-sectional view of the feeding cylinder of a modified PC plastic reaction vessel with optimized flame retardancy according to this utility model.
[0020] 1. Reaction cylinder; 2. Feeding cylinder; 3. Inlet; 4. Outlet pipe; 5. Heating plate; 6. Dispersion hole; 7. Connecting rod; 8. Rotating shaft; 9. Stirring motor; 10. Stirring blade; 11. Screw; 12. Insert rod; 13. Sealing plate; 14. Limiting rod. Detailed Implementation
[0021] The present invention will be further described below with reference to the accompanying drawings.
[0022] according to Figure 1-4 As shown: This utility model provides a PC plastic modified reaction vessel with optimized flame retardancy: including a reaction cylinder 1, and a stirring assembly is provided inside the reaction cylinder 1;
[0023] The stirring assembly includes a stirring motor 9, a rotating shaft 8, and stirring blades 10. The stirring motor 9 is located at the bottom of the reaction cylinder 1, and the rotating shaft 8 is rotatably mounted inside the reaction cylinder 1 and is fixedly connected to the output shaft of the stirring motor 9. Several stirring blades 10 are fixedly connected to the rotating shaft 8. The stirring assembly can improve the mixing effect of PC plastic and flame retardant inside the reaction cylinder 1.
[0024] like Figure 3 As shown, the bottom of the feeding cylinder 2, which is used to store the flame retardant, is provided with several dispersion holes 6 that are connected to the reaction cylinder 1. The feeding cylinder 2 and the reaction cylinder 1 are rotatably connected. By setting multiple dispersion holes 6 and using the rotation of the feeding cylinder 2 to keep these dispersion holes 6 in motion, the uniformity of the distribution of the flame retardant when it falls into the reaction cylinder 1 can be greatly improved.
[0025] like Figure 4 As shown, the feeding cylinder 2 is equipped with a sealing component that can close all the dispersion holes 6, and the sealing component is slidably disposed inside the feeding cylinder 2;
[0026] The sealing assembly includes a sealing plate 13 and a rod 12. The sealing plate 13, which can seal all the dispersion holes 6, is slidably disposed in the feeding cylinder 2, and the rod 12 is fixedly connected to the bottom of the sealing plate 13. The rod 12 is inserted into the dispersion holes 6, and the number of rods 12 is the same as the number of dispersion holes 6. A sealing gasket is provided at the position where the sealing plate 13 contacts the dispersion holes 6, which can increase the sealing performance of the dispersion holes 6.
[0027] A screw 11 is rotatably connected inside the feeding cylinder 2, and a sealing plate 13 is threadedly connected to the screw 11. There is a gap between the sealing plate 13 and the inner wall of the feeding cylinder 2. When the sealing plate 13 slides up and no longer blocks the dispersion hole 6, it can ensure that the liquid flame retardant can flow normally into the dispersion hole 6 through the gap and finally flow out from the dispersion hole 6. A limit rod 14 is fixedly installed inside the feeding cylinder 2, and the sealing plate 13 slides on the limit rod 14. The limit rod 14 can restrict the rotation of the sealing plate 13, thereby converting the rotation of the screw 11 into the up and down movement of the sealing plate 13.
[0028] like Figure 3 As shown, a connecting rod 7 is fixedly connected to the upper end of the stirring assembly, and the connecting rod 7 is fixedly connected to the feeding cylinder 2; the lower end of the connecting rod 7 is fixedly connected to the rotating shaft 8, and the upper end of the connecting rod 7 is fixedly connected to the feeding cylinder 2; by setting the connecting rod 7, the power of the stirring assembly can be transmitted to the feeding cylinder 2, driving the feeding cylinder 2 to rotate, without the need to set an additional power assembly, thus simplifying the structure.
[0029] The feeding cylinder 2 has a feed port 3, and the feed port 3 is threaded with a screw plug. The feed port 3 is used to add flame retardant. The bottom of the reaction cylinder 1 is connected to an outlet pipe 4, and a valve is installed on the outlet pipe 4 to facilitate the discharge of the finally mixed PC plastic. The inner wall of the reaction cylinder 1 is equipped with a heating plate 5, which can provide a suitable temperature for the melting and modification reaction of PC plastic.
[0030] The principle of this utility model
[0031] like Figure 1 , 2 As shown, when using this application, the reaction cylinder 1 contains PC plastic, and the heating plate 5 is activated to melt the PC plastic; the screw plug is opened, and liquid flame retardant is added into the feeding cylinder 2 through the feed port 3, while the sealing plate 13 is blocking the dispersion hole 6. After adding the flame retardant, the screw plug is screwed back in; as shown... Figure 3 , 4As shown, rotating the screw 11 moves the sealing plate 13 upward, preventing the sealing plate 13 and the insert rod 12 from blocking the dispersion hole 6. Then, the stirring motor 9 is immediately started. The flame retardant in the feeding cylinder 2 can enter the reaction cylinder 1 through the evenly distributed dispersion holes 6. At the same time, the stirring motor 9 drives the feeding cylinder 2 to rotate through the connecting rod 7, which keeps the dispersion holes 6 in motion during the feeding process, greatly increasing the initial distribution range of the flame retardant falling into the reaction cylinder 1. Furthermore, the flame retardant falling into the reaction cylinder 1 can be quickly mixed with the PC plastic under the action of the stirring assembly, which can shorten the time required for complete mixing of the two.
[0032] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.
Claims
1. A modified PC plastic reaction vessel with optimized flame retardancy, comprising a reaction cylinder (1), wherein a stirring assembly is disposed within the reaction cylinder (1); characterized in that, Also includes: Feeding cylinder (2); The bottom of the feeding cylinder (2) for storing flame retardant is provided with several dispersion holes (6) that communicate with the reaction cylinder (1), and the feeding cylinder (2) is rotatably connected to the reaction cylinder (1); a sealing component that can close all the dispersion holes (6) is provided inside the feeding cylinder (2), and the sealing component is slidably disposed inside the feeding cylinder (2); a connecting rod (7) is fixedly connected to the upper end of the stirring component, and the connecting rod (7) is fixedly connected to the feeding cylinder (2).
2. The PC plastic modified reaction vessel with optimized flame retardancy according to claim 1, characterized in that: The stirring assembly includes a stirring motor (9), a rotating shaft (8), and stirring blades (10); the stirring motor (9) is located at the bottom of the reaction cylinder (1), the rotating shaft (8) is rotatably located inside the reaction cylinder (1), and the rotating shaft (8) is fixedly connected to the output shaft of the stirring motor (9); a number of stirring blades (10) are fixedly connected to the rotating shaft (8).
3. The PC plastic modified reaction vessel with optimized flame retardancy according to claim 2, characterized in that: The lower end of the connecting rod (7) is fixedly connected to the rotating shaft (8), and the upper end of the connecting rod (7) is fixedly connected to the feeding cylinder (2).
4. The PC plastic modified reaction vessel with optimized flame retardancy according to claim 1, characterized in that: The sealing assembly includes a sealing plate (13) and a rod (12); the sealing plate (13), which can seal all the dispersion holes (6), is slidably disposed in the feeding cylinder (2), and the rod (12) is fixedly connected to the bottom of the sealing plate (13); the rod (12) is inserted into the dispersion hole (6), and the number of rods (12) is the same as the number of dispersion holes (6); a sealing gasket is provided at the position where the sealing plate (13) contacts the dispersion hole (6).
5. A modified PC plastic reaction vessel with optimized flame retardancy according to claim 4, characterized in that: The feeding cylinder (2) is rotatably connected to a screw (11), and a sealing plate (13) is threadedly connected to the screw (11), with a gap between the sealing plate (13) and the inner wall of the feeding cylinder (2); a limiting rod (14) is fixedly installed inside the feeding cylinder (2), and the sealing plate (13) is slidably sleeved on the limiting rod (14).
6. A modified PC plastic reaction vessel with optimized flame retardancy according to claim 1, characterized in that: The feeding cylinder (2) is provided with a feed inlet (3), and a screw plug is threaded into the feed inlet (3); the bottom of the reaction cylinder (1) is connected to an outlet pipe (4), and a heating plate (5) is provided on the inner wall of the reaction cylinder (1).