Blending device for PVB (polyvinyl butyral) thermal insulation film production

Abstract

Relates to a PVB thermal insulation film production blending device in the technical field of PVB film production, which comprises a mixing tank body, a stirring shaft and a stirring motor, a shaft body of the stirring shaft is rotatably mounted in the center of a top cover of the mixing tank body, the stirring motor controls the stirring shaft to rotate, and a plurality of stirrers are mounted on the shaft body, extending into the mixing tank body, of the stirring shaft; the stirring shaft is a hollow shaft with a closed lower end, an electric heating wire is mounted in the stirring shaft, a driven gear is coaxially fixed to the upper end of the stirring shaft, and a driving gear correspondingly meshed with the driven gear is coaxially fixed to an output shaft of the stirring motor; a feeding pipe and a discharging pipe are respectively arranged at the top end and the bottom end of the mixing tank body, a jacket is wrapped on the tank wall of the mixing tank body, and a thermal medium inlet and a thermal medium outlet are respectively formed in the lower end and the upper end of the jacket; the blending device can improve the stirring efficiency and effect through an internal and external auxiliary temperature control structure.

Description

Technical Field

[0001] The utility model relates to the technical field of PVB film production, in particular to a PVB heat insulation film production blending device. Background Art

[0002] As is known, PVB film is a plastic film, which is often used in the interlayer of glass and is also widely used in construction, automobiles and other fields. The application of PVB film in glass products is mainly based on its excellent toughness and safety performance, which enables related products to reduce damage when broken and has certain sound insulation and heat insulation functions. In order to increase the heat insulation effect, some PVB films will also add materials with heat insulation properties, such as nanoparticles, ceramic particles, etc., when the raw materials are stirred and mixed. These materials can reflect or absorb heat radiation and reduce heat conduction, but this also increases the difficulty of stirring evenly.

[0003] The Chinese utility model patent with announcement number CN214605268U discloses a production equipment for uniform thickness PVB film, which uses a planetary stirring method with multiple stirring structures to improve the stirring effect and shorten the production cycle; however, the patent does not consider the effect of temperature on stirring. PVB has a specific melting point and fluidity. Not only will unreasonable temperature range control affect the mixing efficiency, but also the stirring of added insulation materials will affect the stirring effect and the final molding production if the temperature control is uneven. Utility Model Content

[0004] In order to overcome the deficiencies in the background technology and solve the existing technical problems, the utility model discloses a PVB thermal insulation film production blending device, which can improve the mixing efficiency and effect through internal and external auxiliary temperature control structures.

[0005] In order to achieve the above-mentioned invention object, the utility model adopts the following technical solutions:

[0006] A PVB thermal insulation film production blending device comprises a mixing tank body, a stirring shaft rotatably installed in the center of a top cover of the mixing tank body, and a stirring motor for controlling the rotation of the stirring shaft, wherein the stirring shaft extends into the mixing tank body and is installed with a plurality of stirrers; the stirring shaft is configured as a hollow shaft with a closed lower end, an electric heating wire is installed in the stirring shaft, a driven gear is coaxially fixed to the upper end of the stirring shaft, and a driving gear correspondingly meshed with the driven gear is coaxially fixed to the output shaft of the stirring motor; a feed pipe and a discharge pipe are respectively provided at the top and bottom ends of the mixing tank body, a jacket is provided on the tank wall of the mixing tank body, and a heat medium inlet and a heat medium outlet are respectively provided at the lower and upper ends of the jacket.

[0007] Furthermore, both the upper and lower parts of the stirring shaft in the mixing tank are equipped with heat spreaders, and the heat spreader includes a plurality of heat spreader rods vertically and evenly arranged on the stirring shaft body, and the heat spreader rods are provided with a cavity connected to the hollow part of the stirring shaft, and the electric heating wire extends to heat the cavity.

[0008] Furthermore, temperature measuring components are installed on the side walls of the mixing tank corresponding to the upper and lower heat spreaders, and the two temperature measuring components are respectively arranged on both sides of the mixing tank.

[0009] Furthermore, the outer wall of the heat-saturating rod is provided with multiple rows of sharp teeth.

[0010] Furthermore, two agitators are provided and are spaced apart from the two heat spreaders.

[0011] Furthermore, a conductive slip ring is installed at the top end of the stirring shaft, the power connection end of the electric heating wire is correspondingly connected to the output end of the conductive slip ring, and the input end of the conductive slip ring is connected to an external power supply.

[0012] Due to the adoption of the above-mentioned technical solution, the utility model has the following beneficial effects:

[0013] The PVB thermal insulation film production blending device disclosed by the utility model can utilize an external temperature control structure in which a heat medium circulates through a jacket, and an internal temperature control structure in which an electric heating wire is accommodated in the hollow portion of a stirring shaft, to ensure that the stirred materials in a mixing tank can be more accurately and stably controlled between 50 and 70 degrees, and the internal and external auxiliary temperature control methods also greatly improve the uniformity of temperature control, thereby increasing the stirring efficiency and effect, and being more conducive to the mixing and processing of raw material blending in the production steps of the PVB thermal insulation film. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the implementation structure of the utility model;

[0015] In the figure: 1. mixing tank; 2. stirring motor; 3. driving gear; 4. driven gear; 5. stirring shaft; 6. feeding pipe; 7. heat medium outlet; 8. heating rod; 9. sharp teeth; 10. stirrer; 11. temperature measuring component; 12. heat medium inlet; 13. discharge pipe; 14. jacket; 15. electric heating wire. DETAILED DESCRIPTION

[0016] The technical solution of the present invention will be described below in conjunction with the drawings in the embodiments of the present invention. In the description, it should be understood that if there are terms such as "upper", "lower", "front", "rear", "left", "right" and the like indicating directions or positional relationships, they are only corresponding to the drawings of the present invention, for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific direction:

[0017] Combined with Figure 1 The PVB thermal insulation film production and blending device comprises a mixing tank body 1, a stirring shaft 5 rotatably installed in the center of the top cover of the mixing tank body 1, and a stirring motor 2 for controlling the rotation of the stirring shaft 5. The stirring shaft 5 extends into the mixing tank body 1 and is equipped with a plurality of stirrers 10. The stirring motor 2 controls the rotation of the stirring shaft 5, thereby driving the stirrer 10 to stir and mix the raw materials in the mixing tank body 1.

[0018] The stirring shaft 5 is set as a hollow shaft with a closed lower end, and an electric heating wire 15 is installed in the stirring shaft 5. The length of the electric heating wire 15 is close to the length of the stirring shaft 5. After the electric heating wire 15 is powered on and heated, the heat can be transferred to the raw materials in the mixing tank 1 through the stirring shaft 5; as needed, a conductive slip ring is installed on the top of the stirring shaft 5, specifically, the rotating ring of the conductive slip ring is coaxially fixed with the stirring shaft 5, and the fixed ring of the conductive slip ring is externally restricted from rotating, the power connection end of the electric heating wire 15 is correspondingly connected to the output end of the conductive slip ring, and the input end of the conductive slip ring is connected to an external power supply, so that when the electric heating wire 15 rotates with the stirring shaft 5, the power supply is guaranteed to be stable; a driven Gear 4, the output shaft of the stirring motor 2 is coaxially fixed with a driving gear 3 that meshes with the driven gear 4, and the stirring motor 2 drives the stirring shaft 5 to rotate through gear transmission; according to needs, the upper and lower shaft bodies of the stirring shaft 5 in the mixing tank body 1 are both installed with a heat spreader, and the heat spreader includes a plurality of heat spreader rods 8 vertically and evenly arranged on the shaft body of the stirring shaft 5, and the heat spreader rod 8 is provided with a cavity connected to the hollow part of the stirring shaft 5, and the electric heating wire 15 extends and heats into the cavity. The heat spreader rod 8 is horizontally inserted into the raw material during the stirring process, thereby increasing the heat transfer effect and making the stirred raw material heated more evenly; in addition, the outer wall of the rod body of the heat spreader rod 8 is provided with a plurality of rows of sharp teeth 9, which increases the heat transfer area and also has a certain stirring effect;

[0019] According to the needs, the side walls of the mixing tank 1 corresponding to the upper and lower heat spreaders are both installed with temperature measuring components 11, and the two temperature measuring components 11 are respectively arranged on both sides of the mixing tank 1. The temperature measuring components 11 are used to detect the temperature of the raw materials. When the measured temperature difference of the two temperature measuring components 11 is less than 3 degrees, it means that the mixing has been relatively uniform. In addition, two stirrers 10 are provided, and are arranged at intervals between the two heat spreaders;

[0020] A feed pipe 6 and a discharge pipe 13 are respectively provided at the top and bottom ends of the mixing tank body 1. The feed pipe 6 is used to add raw materials into the mixing tank body 1, and the discharge pipe 13 is used for discharge after the stirring is completed. The tank wall of the mixing tank body 1 is wrapped with a jacket 14, and a heat medium inlet 12 and a heat medium outlet 7 are respectively provided at the lower end and the upper end of the jacket 14. The heat medium introduced is generally hot water. The hot water provided from the outside enters the jacket 14 from the heat medium inlet 12 and flows out from the heat medium outlet 7, and the external temperature is controlled by circulating the heat medium through the jacket.

[0021] In the production and blending device of the PVB thermal insulation film described in the utility model, after the discharge pipe 13 is blocked, raw materials are added into the mixing tank 1, and the stirring motor 2 is started for stirring, the electric heating wire 15 is turned on for heating, and the temperature measuring component 11 measures and feedbacks, and the heating temperature of the electric heating wire 15 and the heat medium flow of the jacket 14 are controlled until the measured temperatures of the two temperature measuring components 11 are both between 50 and 70 degrees, and the difference does not exceed 3 degrees.

[0022] The parts of the present invention that are not described in detail are prior art. It is obvious to those skilled in the art that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the above-mentioned embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is limited by the attached claims rather than the above description. Therefore, it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the present invention, and any figure marks in the claims should not be regarded as limiting the content of the claims involved.

Claims

1. A PVB thermal insulation film production blending device, comprising a mixing tank (1), a stirring shaft (5) rotatably mounted in the center of a top cover of the mixing tank (1), and a stirring motor (2) for controlling the rotation of the stirring shaft (5), wherein the stirring shaft (5) extends into the mixing tank (1) and is mounted with a plurality of stirrers (10), wherein: The stirring shaft (5) is configured as a hollow shaft with a closed lower end, an electric heating wire (15) is installed in the stirring shaft (5), a driven gear (4) is coaxially fixed to the upper end of the stirring shaft (5), and a driving gear (3) correspondingly meshing with the driven gear (4) is coaxially fixed to the output shaft of the stirring motor (2); a feed pipe (6) and a discharge pipe (13) are respectively provided at the top and bottom ends of the mixing tank body (1), a jacket (14) is provided on the tank wall of the mixing tank body (1), and a heat medium inlet (12) and a heat medium outlet (7) are respectively provided at the lower and upper ends of the jacket (14).

2. The PVB thermal insulation film production blending device according to claim 1 is characterized in that: The upper and lower shaft bodies of the stirring shaft (5) in the mixing tank body (1) are both equipped with heat spreaders, the heat spreaders comprising a plurality of heat spreaders (8) vertically and evenly arranged around the shaft body of the stirring shaft (5), the heat spreaders (8) being provided with a cavity connected to the hollow part of the stirring shaft (5), the electric heating wire (15) extending into the cavity for heating.

3. The PVB thermal insulation film production blending device according to claim 2 is characterized in that: Temperature measuring components (11) are installed on the side walls of the mixing tank body (1) corresponding to the upper and lower heat equalizers, and the two temperature measuring components (11) are respectively arranged on both sides of the mixing tank body (1).

4. The PVB thermal insulation film production blending device according to claim 2 is characterized in that: The outer wall of the heat-saturating rod (8) is provided with multiple rows of sharp teeth (9).

5. The PVB thermal insulation film production blending device according to claim 2, characterized in that: Two stirrers (10) are provided and are arranged at intervals between the two heat spreaders.

6. The PVB thermal insulation film production blending device according to claim 1, characterized in that: A conductive slip ring is installed at the top end of the stirring shaft (5); the power connection end of the electric heating wire (15) is correspondingly connected to the output end of the conductive slip ring; and the input end of the conductive slip ring is connected to an external power supply.

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