Planetary vacuum stirrer for preparing polyurethane adhesive

Abstract

The utility model belongs to the technical field of stirring equipment, and particularly relates to a planetary vacuum stirrer for preparing a polyurethane adhesive, which comprises a planetary vacuum stirrer, a material barrel and a stirrer above the material barrel, a rotating shaft is arranged below the stirrer, the second stirring unit and the rotating shaft are both located in the material barrel, inner stirring blades are arranged on the outer side of the rotating shaft and located below outer stirring blades on the inner side of the second stirring unit, and when the inner stirring blades and the outer stirring blades rotate to the adjacent positions, materials in the middle area of the inner stirring blades and the outer stirring blades are extruded to promote fusion; meanwhile, bubbles in the materials are discharged in an extrusion mode. The device can accelerate the fusion of different materials and extrude internal air during the fusion period so as to improve the preparation quality of the polyurethane adhesive, and can also promote the materials on the outer ring to move towards the inner ring so as to accelerate the mixing of the materials on the inner ring and the outer ring and improve the mixing uniformity.

Description

Technical Field

[0001] The utility model belongs to the technical field of stirring equipment, in particular to a planetary vacuum mixer for preparing polyurethane adhesive. Background Art

[0002] Polyurethane adhesives refer to adhesives containing carbamate groups or isocyanate groups in the molecular chain. They have excellent chemical bonding with substrates containing active hydrogen, such as porous materials such as foam, plastic, wood, leather, fabric, paper, ceramics, and materials with smooth surfaces such as metal, glass, rubber, and plastic. When preparing polyurethane adhesives, they need to be stirred in a mixer.

[0003] At present, planetary vacuum mixers are used in the preparation of polyurethane adhesives. However, in actual applications, it is found that the exhaust of internal air in this equipment relies solely on centrifugal force to throw out bubbles. Although this method can achieve the exhaust effect to a certain extent, its efficiency is slow and is not suitable for efficient mixing operations of large quantities of materials.

[0004] In order to solve the above problems, the present application proposes a planetary vacuum mixer for preparing polyurethane adhesive. Utility Model Content

[0005] The purpose of the utility model is to provide a planetary vacuum mixer for preparing polyurethane adhesive, which solves the problems raised in the above background technology.

[0006] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0007] The utility model discloses a planetary vacuum mixer for preparing polyurethane adhesive, comprising: a planetary vacuum mixer and a material barrel and an agitator above the planetary vacuum mixer; a rotating shaft and a second agitating unit are provided below the agitator, both of which are located inside the material barrel; an inner agitating blade is provided on the outer side of the rotating shaft, which is located below the outer agitating blade inside the second agitating unit; when the inner agitating blade and the outer agitating blade rotate to adjacent positions, the material in the middle area thereof is squeezed to promote fusion, and at the same time, the bubbles inside the material are discharged by squeezing; arc-shaped scrapers are provided on both sides of the second agitating unit, which are used for scraping the inner wall of the planetary vacuum mixer to make the outer circle material fall off, and the material is guided to the inner circle area by a guide plate on one side of the arc-shaped scraper to accelerate the mixing of different areas.

[0008] Furthermore, the guide plate is an adjacent combined structure on one side of the arc-shaped scraper, and a mixing trough is provided inside the guide plate, and a guide slope is provided on the inner side thereof for guiding different materials to be squeezed and fused with each other.

[0009] Furthermore, an adapter sleeve is provided on the inner side of the second stirring unit for connecting the outer stirring blade to the connecting shaft at one end of the second stirring unit.

[0010] Furthermore, a transfer shaft is provided inside the connecting shaft and is rotatably mounted inside a shaft seat inside the transfer sleeve.

[0011] Furthermore, a spring telescopic rod is provided inside the connecting shaft, one end of which is mounted on a turntable at the tail of the adapter shaft, for maintaining a tight connection between the connecting shaft and the adapter sleeve to prevent loosening.

[0012] Furthermore, a planar spiral spring is provided on the outer side of the shaft seat of the adapter sleeve, and the end of the outer ring is connected to the turntable to drive the outer stirring blade to rotate and reset.

[0013] Furthermore, the outer stirring blade is squeezed by the inner stirring blade when it contacts the inner stirring blade, and at this time, the lower end area of the outer stirring blade rotates upward to form a misalignment with the inner stirring blade.

[0014] The utility model has the following beneficial effects:

[0015] The utility model has an inner stirring blade and an outer stirring blade that are arranged in parallel. When the inner stirring blade and the outer stirring blade rotate to adjacent positions, the materials between the two are squeezed, which can not only discharge the internal air, but also promote the mixing of different materials. Compared with the existing equipment, the material stirring time can be greatly shortened to improve production efficiency, and it is suitable for the efficient stirring operation of large quantities of materials.

[0016] The utility model can automatically scrape the material on the inner wall of the planetary vacuum mixer during the mixing operation through the arc scrapers distributed on the side, and guide it to the inner circle area under the guidance of the guide plate to be stirred by the inner and outer stirring blades. At the same time, part of the material can enter the mixing trough and be squeezed, so that different materials can be fused here to accelerate the mixing, which can not only ensure the mixing quality of the materials in the outer circle area, but also accelerate the mixing efficiency of the materials in the outer circle area.

[0017] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 This is a schematic diagram of the overall appearance structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the internal structure of the material barrel of the present utility model;

[0021] Figure 3 This is a schematic structural diagram of the combined portion of the second stirring unit and the material barrel of the present invention;

[0022] Figure 4 This is a schematic diagram of the internal structure of adjacent guide plates of the present invention;

[0023] Figure 5 This is a schematic structural diagram of the connection between the outer stirring blade and the second stirring unit of the present invention;

[0024] Figure 6 This is a schematic diagram of the internal structure of the adapter sleeve of the present invention;

[0025] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0026] In the figure: 1. Planetary vacuum mixer; 2. Material barrel; 3. Agitator; 4. Rotating shaft; 5. Second stirring unit; 6. Curved scraper; 7. Guide plate; 8. Inner stirring blade; 9. Outer stirring blade; 10. Mixing trough; 11. Adapter sleeve; 12. Guide slope; 13. Connecting shaft; 14. Adapter shaft; 15. Spring telescopic rod; 16. Turntable; 17. Plane scroll spring. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0029] See also Figure 1-6 As shown, the utility model is a planetary vacuum mixer for preparing polyurethane adhesive, comprising: a planetary vacuum mixer 1 and a material barrel 2 and a stirrer 3 above the barrel;

[0030] A rotating shaft 4 and a second stirring unit 5 are provided below the stirrer 3, both of which are located inside the material barrel 2. An inner stirring blade 8 is provided on the outside of the rotating shaft 4, which is located below the outer stirring blade 9 inside the second stirring unit 5. When the inner stirring blade 8 and the outer stirring blade 9 rotate to adjacent positions, the material in the middle area thereof is squeezed to promote fusion, and at the same time, bubbles inside the material are discharged by squeezing.

[0031] The second mixing unit 5 is provided with arc-shaped scrapers 6 on both sides, which are used to scrape the inner wall of the planetary vacuum mixer 1 to make the outer circle material fall off, and guide the material to the inner circle area through the guide plate 7 on one side of the arc-shaped scraper 6 to accelerate the mixing of different areas;

[0032] This embodiment provides a stirring device that can accelerate the mixing of materials and discharge bubbles therein. By utilizing the staggered distribution and reverse rotation of the inner stirring blade 8 and the outer stirring blade 9, the materials can be squeezed and fused together, while the internal bubbles are discharged to improve the preparation quality of the product. At the same time, the combined structure of the arc scraper 6 and the guide plate 7 is utilized to move the material in the outer circle area to the inner circle area to promote fusion, while squeezing part of the material to accelerate the mixing of different materials.

[0033] Among them, the guide plate 7 is an adjacent combined structure on one side of the arc-shaped scraper 6, and a mixing trough 10 is opened inside it, and a guide slope 12 is provided on the inner side thereof. Through the wide inlet and narrow outlet, the material is squeezed inside, which is used to guide different materials to be squeezed and fused with each other.

[0034] Among them, an adapter sleeve 11 is provided on the inner side of the second stirring unit 5, which is used to connect the outer stirring blade 9 to the connecting shaft 13 at one end of the second stirring unit 5. An adapter shaft 14 is provided inside the connecting shaft 13 and is rotatably installed inside the shaft seat inside the adapter sleeve 11. One end of the adapter sleeve 11 is a stepped shaft structure, and its intersection surface is connected to the inner end face of the connecting shaft 13 to increase the sealing performance.

[0035] Among them, a spring telescopic rod 15 is also provided inside the connecting shaft 13, one end of which is installed on the turntable 16 at the tail of the adapter shaft 14, which is used to tighten the outer stirring blade 9 during the rotation operation, so that the interface between the connecting shaft 13 and the adapter sleeve 11 is in close contact to prevent loosening and prevent external materials from penetrating into the interior.

[0036] Among them, a flat spiral spring 17 is provided on the outside of the shaft seat of the adapter sleeve 11, and the end of its outer ring is connected to the turntable 16, so that the outer stirring blade 9 automatically rotates and returns to the predetermined position after being driven to rotate by external force, ensuring its stirring performance.

[0037] The outer stirring blade 9 is squeezed by the inner stirring blade 8 when it contacts the outer stirring blade 9 . At this time, the lower end area of the outer stirring blade 9 rotates upward to form a misalignment with the inner stirring blade 8 .

[0038] It can be understood that the present invention can accelerate the fusion of different materials and squeeze out the internal air during the fusion to improve the preparation quality of the polyurethane adhesive. At the same time, it can also promote the movement of the outer circle material to the inner circle to accelerate the mixing of the inner and outer circle materials and improve the mixing uniformity.

[0039] A specific application of the operation process of this embodiment is as follows: during the stirring operation, the inner stirring blade 8 and the outer stirring blade 9 of opposite rotation directions are first used to drive the materials in different areas to contact each other, and then the inner stirring blade 8 and the outer stirring blade 9 are squeezed when they are close to each other, which can not only accelerate the mixing but also expel the internal bubbles. When in contact, the outer stirring blade 9 automatically rotates to form a dislocation under the rotation connection between the adapter shaft 14 and the adapter sleeve 11, and then the flat spiral spring 17 drives the turntable 16 to rotate so that the outer stirring blade 9 is reset to form the next set of stirring operations, thereby forming a cycle; at the same time, the outer arc scraper 6 is used to scrape the inner wall of the planetary vacuum mixer 1, so that the materials in the outer circle area can be guided by the guide plate 7 to move to the inner circle area to receive the stirring operation of the inner stirring blade 8 and the outer stirring blade 9. At the same time, part of the materials can also be introduced into the mixing trough 10. The outlet becomes narrower under the inclined structure of the guide slope 12, so that the materials are squeezed and fused with each other, achieving the effect of promoting material mixing, which can not only improve the stirring efficiency, but also ensure the mixing uniformity of materials in different areas, thereby improving the use effect of the equipment.

[0040] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0041] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments do not describe all details in detail, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the contents of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A planetary vacuum mixer for preparing polyurethane adhesive, characterized in that: include: A planetary vacuum mixer (1), a material barrel (2), and an agitator (3) above the barrel; A rotating shaft (4) and a second stirring unit (5) are provided below the stirrer (3), both of which are located inside the material barrel (2); an inner stirring blade (8) is provided outside the rotating shaft (4), which is located below the outer stirring blade (9) inside the second stirring unit (5); when the inner stirring blade (8) and the outer stirring blade (9) rotate to adjacent positions, the material in the middle area thereof is squeezed to promote fusion, and at the same time, bubbles inside the material are discharged by squeezing; Arc-shaped scrapers (6) are provided on both sides of the second stirring unit (5) for scraping the inner wall of the planetary vacuum mixer (1) to cause the outer circle material to fall off, and guide the material to the inner circle area through the guide plate (7) on one side of the arc-shaped scraper (6) to accelerate the mixing of different areas.

2. A planetary vacuum mixer for preparing polyurethane adhesive according to claim 1, characterized in that: The guide plate (7) is an adjacent combined structure on one side of the arc-shaped scraper (6), and a mixing trough (10) is provided inside the guide plate, and a guide slope (12) is provided on the inner side thereof for guiding different materials to be squeezed and fused with each other.

3. A planetary vacuum mixer for preparing polyurethane adhesive according to claim 1, characterized in that: An adapter sleeve (11) is provided on the inner side of the second stirring unit (5) for connecting with the connecting shaft (13) of the outer stirring blade (9) adjacent to one end of the second stirring unit (5).

4. A planetary vacuum mixer for preparing polyurethane adhesive according to claim 3, characterized in that: The interior of the connecting shaft (13) is provided with an adapter shaft (14) which is rotatably mounted inside the shaft seat inside the adapter sleeve (11).

5. A planetary vacuum mixer for preparing polyurethane adhesive according to claim 3, characterized in that: A spring telescopic rod (15) is further provided inside the connecting shaft (13), one end of which is mounted on a turntable (16) at the tail of the adapter shaft (14) to maintain a tight connection between the connecting shaft (13) and the adapter sleeve (11) to prevent loosening.

6. A planetary vacuum mixer for preparing polyurethane adhesive according to claim 3, characterized in that: A flat spiral spring (17) is provided on the outer side of the shaft seat of the adapter sleeve (11), and the end of the outer ring of the flat spiral spring is connected to the turntable (16) for driving the outer stirring blade (9) to rotate and reset.

7. A planetary vacuum mixer for preparing polyurethane adhesive according to claim 1, characterized in that: The outer stirring blade (9) is squeezed by the inner stirring blade (8) when it contacts the inner stirring blade (8). At this time, the lower end area of the outer stirring blade (9) rotates upward to form a misalignment with the inner stirring blade (8).

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