Raw material mixing system for polyurethane foam production

Abstract

The utility model discloses a raw material mixing system for polyurethane foam production. The raw material mixing system comprises a mixing tank, a support frame and a fixing ring, the fixing ring sleeves the outer ring of the mixing tank, rotating shafts are arranged on the two sides of the fixing ring, and the fixing ring is rotationally connected with the supporting frame through the rotating shafts; a stirring assembly, a wall scraping assembly and a dispersing disc are arranged in the mixing tank; the stirring assembly is arranged at the axis position of the material mixing tank, the wall scraping assembly is arranged on the stirring assembly, and the dispersing disc is arranged on the stirring assembly and is close to a tank opening of the material mixing tank. Through cooperative work of the stirring assembly, the wall scraping assembly and the dispersing disc, it can be ensured that various raw materials are fully and evenly mixed in the mixing tank, the efficiency and uniformity of the whole mixing system are effectively improved, and the production requirement is met.

Description

Technical Field

[0001] This utility model belongs to the field of polyurethane foam production technology, and specifically relates to a raw material mixing system for polyurethane foam production. Background Technology

[0002] Polyurethane foam is a high-performance foam material widely used in furniture, bedding, vehicle seating, packaging materials, and other fields. It possesses excellent elasticity, durability, sound insulation, and thermal insulation properties. The key to producing high-quality polyurethane foam lies in precisely controlling the raw material ratios and mixing process.

[0003] However, in the production of polyurethane foam, if the materials are not thoroughly mixed, the final foam may exhibit inconsistencies in physical properties such as density and hardness. This will affect the product's quality stability and may lead to localized deformation or damage during use. Furthermore, materials may accumulate on the inner wall or bottom of the tank, forming residues that are difficult to remove. This not only wastes raw materials but may also require additional time and resources to clean the equipment.

[0004] Therefore, the above situation urgently needs to be addressed. Utility Model Content

[0005] Purpose of the utility model: In order to overcome the above shortcomings, the purpose of this utility model is to provide a raw material mixing system for polyurethane foam production, which can effectively improve the efficiency and uniformity of the overall mixing system and meet production needs.

[0006] Technical Solution: A raw material mixing system for polyurethane foam production includes a mixing tank, a support frame, and a fixing ring. The fixing ring is sleeved on the outer ring of the mixing tank, and rotating shafts are provided on both sides of the fixing ring, which are rotatably connected to the support frame through the rotating shafts. The mixing tank includes a stirring assembly, a wall scraping assembly, and a dispersing disc. The stirring assembly is located at the axial center of the mixing tank, the wall scraping assembly is located on the stirring assembly, and the dispersing disc is located on the stirring assembly and close to the opening of the mixing tank. This application ensures that various raw materials are fully and uniformly mixed in the mixing tank through the coordinated work of the stirring assembly, the wall scraping assembly, and the dispersing disc. Furthermore, the rotatable connection between the fixing ring and the support frame through the rotating shafts allows the mixing tank to tilt or rotate within a certain range, which facilitates further mixing and makes the feeding, discharging, and cleaning processes easier, increasing the flexibility and convenience of the system.

[0007] Furthermore, the mixing assembly includes a drive device, a drive shaft, a set of first connecting rods, a set of second connecting rods, a set of third connecting rods, a set of fourth connecting rods, and a mixing blade assembly. The drive shaft is mounted on the drive device, and the first connecting rod, second connecting rod, third connecting rod, and fourth connecting rod are sequentially mounted on the drive shaft. The mixing blade assembly includes a first mixing blade, a second mixing blade, and a third mixing blade, which are arranged in a helical shape at an oblique angle within the mixing tank via the first connecting rod, second connecting rod, third connecting rod, and fourth connecting rod. This application uses multiple sets of connecting rods to drive multiple mixing blades, enabling simultaneous and efficient mixing of large quantities of materials, thus improving the overall processing capacity and production efficiency of the equipment. Furthermore, by arranging the first, second, and third mixing blades in a helical shape at an oblique angle, a complex flow pattern can be formed during the mixing process, thereby greatly enhancing the uniformity and efficiency of the mixing.

[0008] Furthermore, the first, second, third, and fourth connecting rods are all evenly distributed around the drive shaft and arranged radially outward from the center; the first and second connecting rods are positioned opposite to the third and fourth connecting rods. This arrangement allows the mixing assembly to maintain good balance during operation. This helps reduce vibration and increases the stability of the entire mixing system. The radial arrangement effectively guides the material to diffuse from the center outwards, and combined with the spiral mixing blade layout, it creates a more complex flow pattern within the mixing tank, thereby further improving the mixing effect.

[0009] Furthermore, the heads of the first, second, and third stirring blades are each connected to their corresponding first connecting rods, and their tails are each connected to their corresponding fourth connecting rods; the second and third connecting rods respectively abut against the middle positions of the first, second, and third stirring blades. This design significantly enhances the mechanical strength and rigidity of the entire mixing assembly. By fixing the stirring blades to multiple connection points, the flow path of the material within the mixing tank can be more precisely controlled. In particular, the central support helps maintain the optimal angle of the stirring blades, ensuring that the material is fully and uniformly mixed throughout the mixing process.

[0010] Furthermore, the wall scraping assembly includes an upper wall scraping assembly and a lower wall scraping assembly; both the upper and lower wall scraping assemblies are connected to the stirring assembly. This application continuously scrapes off the material adhering to the tank wall and remixes it into the main material flow. The wall scraping assembly helps maintain the dynamic mixing state of the material, avoiding localized unevenness caused by material adhering to the wall surface, and improving overall mixing efficiency.

[0011] Furthermore, the upper scraper assembly includes a set of upper scraper connecting rods and a set of upper scraper blades; the upper scraper connecting rods are obliquely mounted on the drive shaft, and the upper scraper blades are connected to the upper scraper connecting rods and fitted against the inner wall of the mixing tank; the lower scraper assembly includes a set of lower scraper connecting rods and a set of lower scraper blades, the lower scraper connecting rods are mounted on a fourth connecting rod, and the lower scraper blades are connected to the upper scraper connecting rods and fitted against the inner wall of the mixing tank. The design of the upper and lower scraper assemblies in this application achieves omnidirectional mixing from the top to the bottom of the mixing tank, ensuring that the entire inner wall surface is effectively covered and reducing material residue.

[0012] The inclined upper scraper connecting rod and the rationally arranged lower scraper components work together to promote the dynamic flow of materials throughout the mixing tank and improve the mixing uniformity.

[0013] Furthermore, the upper scraper connecting rod has the same inclination angle as the stirring blade assembly and is positioned within the gaps of the stirring blade assembly. Because the upper scraper connecting rod and the stirring blade assembly maintain the same inclination angle, the entire mixing system can achieve a more consistent and coordinated material flow pattern within the mixing tank. This helps to further improve the mixing uniformity of the materials, ensuring that all raw materials are fully mixed.

[0014] Furthermore, the lower scraper connecting rod is arranged in an "M" shape. This "M"-shaped structure provides additional support points, enhancing the overall rigidity and stability of the lower scraper assembly.

[0015] Furthermore, both the upper and lower scraper blades are made of flexible material. The flexible material used in this application is relatively soft, resulting in less wear on the inner wall of the mixing tank.

[0016] As can be seen from the above technical solution, this utility model has the following beneficial effects:

[0017] 1. The raw material mixing system for polyurethane foam production disclosed in this application can ensure that various raw materials are fully and uniformly mixed in the mixing tank through the coordinated work of the stirring component, the wall scraping component and the dispersing disc; and the fixing ring is rotatably connected to the support frame through the rotating shaft, so that the mixing tank can be tilted or rotated within a certain range, which helps to further mix the materials and facilitates the feeding, discharging and cleaning processes, increasing the flexibility and convenience of the system.

[0018] 2. The raw material mixing system for polyurethane foam production disclosed in this application uses multiple sets of connecting rods to drive multiple mixing blades, which can simultaneously and efficiently mix a large amount of material, thereby improving the overall processing capacity and production efficiency of the equipment. Furthermore, by arranging the first, second, and third mixing blades in an oblique spiral shape, a complex flow pattern can be formed during the mixing process, which greatly enhances the uniformity and efficiency of the mixing.

[0019] 3. The raw material mixing system for polyurethane foam production disclosed in this application continuously scrapes off the material adhering to the tank wall and remixes it into the main material flow. The scraping component helps maintain the dynamic mixing state of the material, avoids local unevenness caused by the material adhering to the wall surface, and improves the overall mixing efficiency.

[0020] 4. The raw material mixing system for polyurethane foam production disclosed in this application achieves a more consistent and coordinated material flow pattern within the mixing tank by maintaining the same inclination angle between the upper scraper connecting rod and the stirring blade assembly. This helps to further improve the mixing uniformity of the materials and ensures that all raw materials are fully mixed. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the external structure of a raw material mixing system for polyurethane foam production.

[0022] Figure 2 This is a schematic diagram of the internal structure of a raw material mixing system for polyurethane foam production.

[0023] Figure 3 A schematic diagram of the mixing component structure of a raw material mixing system for polyurethane foam production.

[0024] Figure 4 A schematic diagram of the scraping component structure of a raw material mixing system for polyurethane foam production.

[0025] Explanation of reference numerals in the attached drawings: 1-Mixing tank; 2-Agitating assembly; 201-Drive device; 202-Drive shaft; 203-First connecting rod; 204-Second connecting rod; 205-Third connecting rod; 206-Fourth connecting rod; 207-First stirring blade; 208-Second stirring blade; 209-Third stirring blade; 3-Support frame; 4-Discharge area; 5-Fixing ring; 6-Rotating shaft; 7-Control box; 8-Upper wall scraper assembly; 801-Upper wall scraper connecting rod; 802-Upper wall scraper blade; 9-Lower wall scraper assembly; 901-Lower wall scraper connecting rod; 902-Lower wall scraper blade; 10-Dispersion disc. Detailed Implementation

[0026] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments.

[0027] Example 1

[0028] This embodiment describes a raw material mixing system for polyurethane foam production. Please refer to [link / reference]. Figures 1-2 As shown, the system includes a mixing tank 1, a support frame 3, a feeding area 4, a fixing ring 5, and a control box 7. The fixing ring 5 is sleeved on the outer ring of the mixing tank 1, and rotating shafts 6 are provided on both sides of the fixing ring 5, which are rotatably connected to the support frame 3. The mixing tank 1 includes a stirring assembly 2, a wall scraping assembly, and a dispersing disc 10. The stirring assembly 2 is located at the axial position of the mixing tank 1, the wall scraping assembly is located on the stirring assembly 2, and the dispersing disc 10 is located on the stirring assembly 2 and close to the opening of the mixing tank 1. The feeding area 4 is located at the bottom of the mixing tank 1, and the control box 7 is located on the outside of the mixing tank 1.

[0029] Furthermore, the wall scraping assembly includes an upper wall scraping assembly 8 and a lower wall scraping assembly 9; both the upper wall scraping assembly 8 and the lower wall scraping assembly 9 are connected to the stirring assembly 2.

[0030] For further details, please refer to... Figure 3 As shown, the stirring assembly 2 includes a driving device 201, a driving shaft 202, a set of first connecting rods 203, a set of second connecting rods 204, a set of third connecting rods 205, a set of fourth connecting rods 206, and a stirring blade assembly. The driving shaft 202 is mounted on the driving device 201, and the first connecting rods 203, second connecting rods 204, third connecting rods 205, and fourth connecting rods 206 are sequentially mounted on the driving shaft 202. The stirring blade assembly includes a first stirring blade 207, a second stirring blade 208, and a third stirring blade 209. The first stirring blade 207, the second stirring blade 208, and the third stirring blade 209 are arranged in a spiral shape at an oblique angle inside the mixing tank 1 via the first connecting rods 203, the second connecting rods 204, the third connecting rods 205, and the fourth connecting rods 206.

[0031] Furthermore, the first connecting rod 203, the second connecting rod 204, the third connecting rod 205, and the fourth connecting rod 206 are all evenly distributed around the drive shaft 202 and arranged radially outward from the center; the first connecting rod 203, the second connecting rod 204 are arranged opposite to the third connecting rod 205 and the fourth connecting rod 206.

[0032] Furthermore, the heads of the first stirring blade 207, the second stirring blade 208, and the third stirring blade 209 are each connected to the corresponding first connecting rod 203, and their tails are each connected to the corresponding fourth connecting rod 206; the second connecting rod 204 and the third connecting rod 205 respectively abut against the middle positions of the first stirring blade 207, the second stirring blade 208, and the third stirring blade 209.

[0033] For further details, please refer to... Figure 4 As shown, the upper scraper assembly 8 includes a set of upper scraper connecting rods 801 and a set of upper scraper blades 802; the upper scraper connecting rods 801 are obliquely disposed on the drive shaft 202, and the upper scraper blades 802 are connected to the upper scraper connecting rods 801 and are fitted against the inner wall of the mixing tank 1; the lower scraper assembly 9 includes a set of lower scraper connecting rods 901 and a set of lower scraper blades 902, the lower scraper connecting rods 901 are disposed on the fourth connecting rod 206, and the lower scraper blades 902 are connected to the upper scraper connecting rods 801 and are fitted against the inner wall of the mixing tank 1.

[0034] Furthermore, the upper scraper connecting rod 801 has the same inclination angle as the stirring blade assembly and is disposed in the gap of the stirring blade assembly.

[0035] Furthermore, the lower scraper connecting rod 901 is arranged in an "M" shape.

[0036] Furthermore, both the upper scraper blade 802 and the lower scraper blade 902 are made of flexible material.

[0037] Furthermore, the working steps of the raw material mixing system for polyurethane foam production include:

[0038] Step S1: Start the system: First, start the equipment through the control box 7.

[0039] Step S2, Material Input: The raw materials to be mixed are added to the mixing tank 1 from the feeding area 4. As the stirring component 2 rotates, the dispersing disc 10 also rotates to further disperse the particles in the material, ensuring that the material can be dispersed more finely and improving the consistency and uniformity of the mixture.

[0040] Step S3, Mixing: As the stirring component 2 continues to rotate, the first stirring blade 207, the second stirring blade 208 and the third stirring blade 209 work in a spiral oblique arrangement, which optimizes the spatial configuration and improves the mixing uniformity of the materials.

[0041] During this process, the upper scraper assembly 8 and the lower scraper assembly 9 also rotate together with the mixing assembly, continuously cleaning the inner wall of the mixing tank 1, preventing the material from accumulating on the tank wall, and ensuring the maximum utilization rate of the material and the mixing quality.

[0042] At the same time, the rotating shaft 6 on the support frame 3 drives the fixing ring 5, causing the mixing tank 1 to sway slightly.

[0043] Step S4, Continuous Monitoring and Adjustment: Operating parameters can be adjusted via control box 7 to optimize the mixing effect, based on actual needs. This ensures that all raw materials are fully and uniformly mixed.

[0044] Step S5: Complete mixing and discharge: After the predetermined mixing time and conditions are reached, stop the drive device 201 and open the discharge zone 4.

[0045] Step S6, Cleaning Mixing Tank 1: Clean the internal residual materials to reduce the risk of cross-contamination between different batches and maintain the equipment in good condition.

[0046] Furthermore, the working principle of the raw material mixing system for polyurethane foam production is as follows: the power of the entire system comes from the drive device 201 controlled by the control box 7. When the system is started, the drive device 201 drives the drive shaft 202 to rotate, thereby causing the dispersion disc 10, the first connecting rod 203, the second connecting rod 204, the third connecting rod 205, the fourth connecting rod 206 and the stirring blade assembly connected to the drive shaft to rotate accordingly.

[0047] The dispersing disc 10 near the tank opening rotates together with the stirring assembly 2. It is designed to further break up agglomerates in the material, ensuring that the material particles can be dispersed more finely, thereby improving the consistency and uniformity of the mixture.

[0048] The first stirring blade 207, the second stirring blade 208 and the third stirring blade 209 are arranged in a spiral oblique direction, which optimizes the spatial arrangement and improves the uniformity of mixing.

[0049] The upper scraper assembly 8 and the lower scraper assembly 9 are attached to the inner wall of the mixing tank 1 and move as the stirring assembly rotates. They are made of flexible material, which can effectively remove material adhering to the tank wall, avoiding quality problems caused by material residue, and can also adapt to changes in the shape of the tank wall, reducing wear on the tank wall.

[0050] Therefore, all components work together, operated and monitored through the control box 7, enabling the materials to reach an ideal mixing state in a short time. Among them, the stirring component 2 is responsible for basic material mixing; the dispersing disc 10 provides additional dispersing force to ensure the fineness of the materials; and the wall scraping component ensures the maximum utilization rate and mixing quality of the materials during the mixing process.

[0051] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements can be made without departing from the principle of the present utility model, and these improvements should also be considered within the protection scope of the present utility model.

Claims

1. A raw material mixing system for polyurethane foam production, characterized in that, The mixture includes a mixing tank (1), a support frame (3), and a fixing ring (5); the fixing ring (5) is fitted around the outer ring of the mixing tank (1), and the fixing ring (5) is provided with rotating shafts (6) on both sides, which are rotatably connected to the support frame (3) through the rotating shafts (6); the mixing tank (1) includes a stirring assembly (2), a wall scraping assembly, and a dispersing disc (10); the stirring assembly (2) is located at the axial position of the mixing tank (1), the wall scraping assembly is located on the stirring assembly (2), and the dispersing disc (10) is located on the stirring assembly (2) and close to the opening of the mixing tank (1).

2. The raw material mixing system for polyurethane foam production according to claim 1, characterized in that, The stirring assembly (2) includes a driving device (201), a driving shaft (202), a set of first connecting rods (203), a set of second connecting rods (204), a set of third connecting rods (205), a set of fourth connecting rods (206), and a stirring blade assembly. The driving shaft (202) is mounted on the driving device (201), and the first connecting rod (203), the second connecting rod (204), the third connecting rod (205), and the fourth connecting rod (206) are sequentially mounted on the driving shaft (202). The stirring blade assembly includes a first stirring blade (207), a second stirring blade (208), and a third stirring blade (209). The first stirring blade (207), the second stirring blade (208), and the third stirring blade (209) are arranged in a spiral shape at an oblique angle in the mixing tank (1) through the first connecting rod (203), the second connecting rod (204), the third connecting rod (205), and the fourth connecting rod (206).

3. The raw material mixing system for polyurethane foam production according to claim 2, characterized in that, The first connecting rod (203), the second connecting rod (204), the third connecting rod (205), and the fourth connecting rod (206) are all evenly distributed around the drive shaft (202) and arranged radially from the center outward; the first connecting rod (203), the second connecting rod (204) are arranged opposite to the third connecting rod (205) and the fourth connecting rod (206).

4. The raw material mixing system for polyurethane foam production according to claim 2, characterized in that, The heads of the first stirring blade (207), the second stirring blade (208), and the third stirring blade (209) are each connected to the corresponding first connecting rod (203), and their tails are connected to the corresponding fourth connecting rod (206); the second connecting rod (204) and the third connecting rod (205) abut against the middle of the first stirring blade (207), the second stirring blade (208), and the third stirring blade (209) respectively.

5. The raw material mixing system for polyurethane foam production according to claim 1, characterized in that, The wall scraping assembly includes an upper wall scraping assembly (8) and a lower wall scraping assembly (9); both the upper wall scraping assembly (8) and the lower wall scraping assembly (9) are connected to the stirring assembly (2).

6. The raw material mixing system for polyurethane foam production according to claim 5, characterized in that, The upper scraper assembly (8) includes a set of upper scraper connecting rods (801) and a set of upper scraper blades (802); the upper scraper connecting rods (801) are obliquely disposed on the drive shaft (202), and the upper scraper blades (802) are connected to the upper scraper connecting rods (801) and are attached to the inner wall of the mixing tank (1); the lower scraper assembly (9) includes a set of lower scraper connecting rods (901) and a set of lower scraper blades (902); the lower scraper connecting rods (901) are disposed on the fourth connecting rod (206), and the lower scraper blades (902) are connected to the upper scraper connecting rods (801) and are attached to the inner wall of the mixing tank (1).

7. The raw material mixing system for polyurethane foam production according to claim 6, characterized in that, The upper scraper connecting rod (801) has the same inclination angle as the stirring blade assembly and is disposed in the gap of the stirring blade assembly.

8. A raw material mixing system for polyurethane foam production according to claim 6, characterized in that, The lower scraper connecting rod (901) is arranged in an "M" shape.

9. A raw material mixing system for polyurethane foam production according to claim 6, characterized in that, Both the upper scraper blade (802) and the lower scraper blade (902) are made of flexible material.

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