Solvent-free polyurethane adhesive production filtering device

Abstract

The utility model provides a solvent-free polyurethane adhesive production filter device, which relates to the technical field of polyurethane adhesive production and comprises a material injection pipe, a buffer bin is mounted at the bottom of the material injection pipe, a filter bin is mounted on one side of the buffer bin, and a center rod is inserted into the buffer bin and the filter bin. A coarse filtration hole is formed in the side, close to the buffer bin, of the filter bin, a fine filtration barrel is installed on the inner wall of the filter bin, a scraper is installed on the surface of the side, close to the fine filtration barrel, of the center rod, adhesive is conveyed into the buffer bin through a material injection pipe, and after the buffer bin is filled with the adhesive, the adhesive can penetrate through the coarse filtration hole to enter the fine filtration barrel in the filter bin under the action of pressure; meanwhile, a central rod is driven by an external motor to rotate to drive a scraping plate to rotate in the fine filtering barrel, the scraping plate can concentrate impurities generated by the inner wall of the fine filtering barrel during filtering during rotation so as to avoid blockage of the fine filtering barrel, and the scraping plate can assist in pushing an adhesive to penetrate through the fine filtering barrel so as to enhance the filtering effect and shorten the filtering time.

Description

Technical Field

[0001] The utility model relates to the technical field of polyurethane adhesive production, in particular to a solvent-free polyurethane adhesive production filtering device. Background Art

[0002] Polyurethane adhesive is an important component of the rapidly developing polyurethane resin. It has excellent performance and has been widely used in many aspects. It is one of the important varieties of the eight major synthetic adhesives. It has excellent chemical adhesion to porous materials such as foam, plastic, wood, and materials with smooth surfaces such as metal, glass, and rubber.

[0003] In the production process of polyurethane adhesives, in order to obtain better quality results and avoid impurities in the adhesive, it will be filtered. Generally, the adhesive has a low viscosity and can be filtered by using its own weight to pass through a filter or filter cloth. However, some solvent-free polyurethane adhesives have a certain viscosity and will produce viscous colloids inside due to the influence of storage environment or specific formula. In this case, the filtering effect of using its own weight to pass through the filter is poor and the filtration time is long, which affects the actual processing efficiency and the quality of the finished adhesive products. Utility Model Content

[0004] The purpose of the utility model is to solve the following problems existing in the prior art:

[0005] In the production process of polyurethane adhesives, in order to obtain better quality results and avoid impurities in the adhesive, it will be filtered. Generally, the adhesive has a low viscosity and can be filtered by using its own weight to pass through a filter or filter cloth. However, some solvent-free polyurethane adhesives have a certain viscosity and will produce viscous colloids inside due to the influence of storage environment or specific formula. In this case, the filtering effect of using its own weight to pass through the filter is poor and the filtration time is long, which affects the actual processing efficiency and the quality of the finished adhesive products.

[0006] In order to solve the problems existing in the prior art, the utility model provides a solvent-free polyurethane adhesive production filtration device, including an injection pipe, a buffer bin is installed at the bottom of the injection pipe, a filter bin is installed on one side of the buffer bin, a center rod is inserted into the buffer bin and the filter bin, a coarse filter hole is opened on the side of the filter bin close to the buffer bin, a fine filter barrel is installed on the inner wall of the filter bin, and a scraper is installed on the surface of the side of the center rod close to the fine filter barrel.

[0007] The utility model provides a solvent-free polyurethane adhesive production filtering device.

[0008] Furthermore, the buffer bin is a flat-topped cone that is vertically arranged as a whole, has a cavity inside and an opening at one end, and the open end faces the filter bin, and the injection pipe is arranged on the inclined surface of the buffer bin and communicates with the internal cavity thereof.

[0009] Furthermore, the inner diameter of the opening side of the buffer bin is larger than the coarse filter hole and covers the coarse filter hole.

[0010] Furthermore, the coarse filter holes are grid-like mesh holes, and the two sides are respectively connected to the buffer bin and the fine filter barrel.

[0011] Furthermore, the center rod passes through the buffer bin, the filter bin and the fine filter barrel in sequence and extends to the other side through the filter bin, and a pulley is provided at the end of the center rod away from the buffer bin, and is connected to an external motor via a transmission belt through the pulley.

[0012] Furthermore, the scraper arranged on the surface of the central rod is located inside the fine filter barrel and there are six scrapers in total, which are radially arranged with the central rod as the center.

[0013] Furthermore, the scraper is divided into a plate body and a scraper head, wherein the plate body is directly connected to the center rod, and the scraper head is arranged at the end of the plate body, wherein the plate body is made of a hard composite material, and the scraper head is made of a flexible rubber material and has a length greater than the distance between the end of the plate body and the fine filter barrel and abuts against the inner wall of the fine filter barrel.

[0014] Furthermore, an opening is provided at the bottom of the filter bin.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The utility model conveys adhesive into the buffer bin through a material injection pipe, and when the adhesive in the buffer bin is full, it will pass through the coarse filter holes under the action of pressure and enter the fine filter barrel in the filter bin. At the same time, the center rod is driven by an external motor to rotate and drive the scraper to rotate in the fine filter barrel. When the scraper rotates, it can concentrate impurities generated on the inner wall of the fine filter barrel during filtration to avoid clogging of the fine filter barrel, and the scraper can assist in pushing the adhesive to pass through the fine filter barrel to enhance the filtration effect and shorten the filtration time. In this process, the viscous glue balls will be broken up by the coarse filter holes. If the broken glue balls meet the filtration conditions, they will be filtered normally. If the viscosity is still high and cannot be filtered, they will be concentrated by the scraper when the scraper rotates to avoid affecting subsequent filtration. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 It is a schematic diagram of the scraper of the utility model;

[0019] Figure 3This is a schematic diagram of a fine filter barrel of the utility model;

[0020] Figure numerals: 1. injection pipe; 2. buffer bin; 3. filter bin; 4. center rod; 5. coarse filter hole; 6. fine filter barrel; 7. scraper. DETAILED DESCRIPTION

[0021] In order to make the technical means, creative features, objectives and effects of the utility model easy to understand, the utility model is further described below in conjunction with specific embodiments and drawings, but the following embodiments are only preferred embodiments of the utility model, not all. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the protection scope of the present invention.

[0022] The specific embodiments of the present utility model are described below in conjunction with the accompanying drawings.

[0023] Example 1

[0024] like Figure 1-3 As shown, a solvent-free polyurethane adhesive production filtering device comprises an injection pipe 1, a buffer bin 2 is installed at the bottom of the injection pipe 1, a filter bin 3 is installed on one side of the buffer bin 2, the buffer bin 2 is a flat-top cone arranged vertically as a whole, a cavity is arranged inside, one end is arranged with an opening, and the open end faces the filter bin 3, an opening is arranged at the bottom of the filter bin 3, the injection pipe 1 is arranged on the inclined surface of the buffer bin 2 and is connected with the internal cavity thereof, a center rod 4 is inserted inside the buffer bin 2 and the filter bin 3, a coarse filter hole 5 is opened on one side of the filter bin 3 close to the buffer bin 2, the inner diameter of the opening side of the buffer bin 2 is larger than the coarse filter hole 5 and covers the coarse filter hole 5, a fine filter barrel 6 is installed on the inner wall of the filter bin 3, the coarse filter hole 5 is a grid-like mesh, and the two sides are respectively connected to the buffer bin 2 And a fine filter barrel 6, the center rod 4 passes through the buffer bin 2, the filter bin 3 and the fine filter barrel 6 in sequence and extends through the filter bin 3 to the other side, and a pulley is provided at the end of the center rod 4 away from the buffer bin 2, and is connected to an external motor through the pulley using a transmission belt, and a scraper 7 is installed on the surface of the center rod 4 close to the fine filter barrel 6, the scraper 7 provided on the surface of the center rod 4 is located inside the fine filter barrel 6 and there are six scrapers 7, which are radially arranged with the center rod 4 as the center, and the scraper 7 is divided into a plate body and a scraper head, wherein the plate body is directly connected to the center rod 4, and the scraper head is arranged at the end of the plate body, wherein the plate body is made of a hard composite material, and the scraper head is made of a flexible rubber material and has a length greater than the distance between the end of the plate body and the fine filter barrel 6 and abuts against the inner wall of the fine filter barrel 6.

[0025] Working principle description: First, when in use, the adhesive is transported into the buffer bin 2 through the injection pipe 1. When the adhesive in the buffer bin 2 is full, it will pass through the coarse filter hole 5 under the action of pressure and enter the fine filter barrel 6 in the filter bin 3. In this process, the glue clusters are broken up and the larger impurities inside are removed. At the same time, the center rod 4 rotates under the drive of the external motor to drive the scraper 7 to rotate in the fine filter barrel 6. When the scraper 7 rotates, it can concentrate the impurities generated on the inner wall of the fine filter barrel 6 during filtration to avoid clogging of the fine filter barrel 6. The scraper 7 can also assist in pushing the adhesive through the fine filter barrel 6 to enhance the filtration effect and shorten the filtration time. The filtered adhesive can fall directly into the collection area through the bottom opening of the filter bin 3 for centralized treatment.

[0026] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A solvent-free polyurethane adhesive production and filtering device, comprising an injection pipe (1), characterized in that: A buffer bin (2) is installed at the bottom of the injection pipe (1), a filter bin (3) is installed on one side of the buffer bin (2), a center rod (4) is inserted into the buffer bin (2) and the filter bin (3), a coarse filter hole (5) is opened on the side of the filter bin (3) close to the buffer bin (2), a fine filter barrel (6) is installed on the inner wall of the filter bin (3), and a scraper (7) is installed on the surface of the side of the center rod (4) close to the fine filter barrel (6).

2. A solvent-free polyurethane adhesive production and filtering device according to claim 1, characterized in that: The buffer bin (2) is a flat-topped cone that is vertically arranged as a whole, has a cavity inside and an opening at one end, and the opening end faces the filter bin (3). The injection pipe (1) is arranged on the inclined surface of the buffer bin (2) and is connected to the internal cavity thereof.

3. A solvent-free polyurethane adhesive production and filtering device according to claim 2, characterized in that: The inner diameter of the opening side of the buffer bin (2) is larger than the coarse filter hole (5) and covers the coarse filter hole (5).

4. A solvent-free polyurethane adhesive production and filtering device according to claim 1, characterized in that: The coarse filter holes (5) are grid-shaped mesh holes, and the two sides are respectively connected to the buffer bin (2) and the fine filter barrel (6).

5. The solvent-free polyurethane adhesive production and filtering device according to claim 1, characterized in that: The central rod (4) passes through the buffer bin (2), the filter bin (3) and the fine filter barrel (6) in sequence and extends through the filter bin (3) to the other side, and a pulley is provided at the end of the central rod (4) away from the buffer bin (2), and is connected to an external motor via a transmission belt via the pulley.

6. The solvent-free polyurethane adhesive production and filtering device according to claim 1, characterized in that: The scraper (7) arranged on the surface of the central rod (4) is located inside the fine filter barrel (6) and there are six scrapers (7) in total, which are arranged radially with the central rod (4) as the center.

7. The solvent-free polyurethane adhesive production and filtering device according to claim 1, characterized in that: The scraper (7) is divided into a plate body and a scraper head, wherein the plate body is directly connected to the central rod (4), and the scraper head is arranged at the end of the plate body, wherein the plate body is made of a hard composite material, and the scraper head is made of a flexible rubber material and has a length greater than the distance between the end of the plate body and the fine filter barrel (6) and abuts against the inner wall of the fine filter barrel (6).

8. The solvent-free polyurethane adhesive production and filtering device according to claim 1, characterized in that: The bottom of the filter bin (3) is provided with an opening.

Images