Low-melting-point washable polyester hot melt adhesive production grinding device

Abstract

The utility model relates to hot melt adhesive production technical field, specifically is a kind of low melting point washable polyester hot melt adhesive production and is used to grind powder device, including support seat, fixed installation is provided with grinding powder box body on the support seat, grinding powder box body is provided with grinding powder cavity, grinding powder cavity is provided with crushing assembly and grinding assembly in, ring groove is provided between crushing assembly and grinding assembly, several spray heads are fixedly installed in ring groove, the spray head side is located in grinding powder cavity, one side of ring groove is provided with air pump, nitrogen machine is provided on the side of air pump, the side above grinding powder box body is provided with feed inlet, the side below grinding powder box body is provided with discharge valve, reduce the material temperature at grinding assembly, prevent softening adhesion, caking.

Description

Technical Field

[0001] This utility model relates to the field of hot melt adhesive production technology, and more specifically, to a grinding device for producing low-melting-point washable polyester hot melt adhesive. Background Technology

[0002] Low-melting-point washable polyester hot melt adhesive is a functional hot melt adhesive based on polyester. Its outstanding feature is its low melting point (usually between 80-120℃), which facilitates rapid bonding under mild conditions. It also has excellent wash resistance, maintaining stable bond strength even after multiple washes (including machine washing and high-temperature washing), and is not prone to delamination or peeling. This type of hot melt adhesive is widely used in textiles, clothing, and home textiles, and is especially suitable for fabric bonding, lace fixing, and label pasting that require frequent washing. It also has the advantages of being environmentally friendly (no solvent evaporation), highly efficient (rapid curing), and weather-resistant. In the production process of low-melting-point washable polyester hot melt adhesive, it is necessary to use a grinding device to grind the raw materials into fine powder.

[0003] For example, Chinese patent disclosure: A grinding device for the production of low-melting-point copolyester hot melt adhesive, application number: CN202220645696.3, includes a support base, a grinding chamber, a crushing component, and a grinding assembly. The internal space of the grinding chamber is divided into a crushing chamber, a grinding chamber, and a motor chamber. A separator is provided inside the grinding chamber. The crushing component includes a first motor and a crushing roller. The grinding assembly includes a grinding roller, a second motor, and a grinding disc. Raw materials enter the crushing chamber for crushing, avoiding large particles from affecting the operation of the grinding roller. The crushed raw materials pass through a filter plate and enter the grinding chamber for grinding. The powder is sucked out by the separator and sent to the discharge pipe by the action of the rotating grinding roller and the separation of the separator. A feed pipe and a feed valve are provided at the top of the crushing chamber. Closing the feed valve prevents powder from flying out of the feed pipe, affecting the environment and making collection difficult.

[0004] However, in the above technical solutions, grinding is one of the key processes in the production of low-melting-point washable polyester hot melt adhesive, which directly affects the particle size distribution, flowability and subsequent processing performance of the product. However, due to the low melting point and heat sensitivity of polyester hot melt adhesive itself, it is very easy for the material to soften, stick together or even clump during mechanical grinding due to frictional heat generation. This not only reduces the grinding efficiency, but also affects the uniformity and storage stability of the powder. Utility Model Content

[0005] The main objective of this invention is to provide a grinding device for the production of low-melting-point washable polyester hot melt adhesive. This device effectively solves the problem in the background art where grinding is a key process in the production of low-melting-point washable polyester hot melt adhesive, directly affecting the particle size distribution, flowability, and subsequent processing performance of the product. However, due to the low melting point and heat sensitivity of polyester hot melt adhesive, it is prone to softening, sticking, or even clumping of the material due to frictional heat generation during mechanical grinding. This not only reduces the grinding efficiency but also affects the uniformity and storage stability of the powder.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a grinding device for producing low-melting-point washable polyester hot melt adhesive, comprising a support base, on which a grinding box is fixedly installed, a grinding chamber is provided on the grinding box, a crushing component and a grinding component are provided in the grinding chamber, an annular groove is provided between the crushing component and the grinding component, a plurality of nozzles are fixedly installed in the annular groove, one side of the nozzles is located in the grinding chamber, an air pump is provided on one side of the annular groove, a nitrogen generator is provided on one side of the air pump, a feed inlet is provided on the upper side of the grinding box, and a discharge valve is provided on the lower side of the grinding box.

[0007] Preferably, the annular groove is located on the grinding chamber, and the air pump and nitrogen generator are both fixedly installed on the grinding chamber.

[0008] Preferably, the nozzle includes a nozzle body, and a spring is fixedly installed at the air outlet of the nozzle body, with a baffle provided on the spring.

[0009] Preferably, the nozzle body is provided with several guide grooves on the side near the baffle, and guide columns are slidably disposed in the guide grooves.

[0010] Preferably, the baffle is located outside the nozzle body, and the guide slide is fixedly connected to the baffle.

[0011] Preferably, both the guide groove and the guide column are T-shaped.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] (1) When this utility model is used, the material is first poured into the grinding chamber through the feed port, and then the crushing component and the grinding component are used to crush and grind the material in sequence. During this process, the nitrogen generated by the nitrogen generator is sent into the ring groove through the air pump. When the nitrogen is sent into the nozzle body through the ring groove, the nitrogen squeezes the baffle, causing the baffle to move away from the nozzle body. The spring deforms and releases the baffle from the air outlet of the nozzle body. The nitrogen is sprayed to the grinding component through the nozzle body, reducing the material temperature at the grinding component and preventing softening, adhesion and clumping. At the same time, the inert gas (nitrogen) can also prevent the risk of dust explosion. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of a grinding device for producing low-melting-point washable polyester hot melt adhesive according to this utility model.

[0015] Figure 2 This is a schematic diagram of the internal structure of a grinding device for producing low-melting-point washable polyester hot melt adhesive according to this utility model.

[0016] Figure 3 This is a schematic diagram of the nozzle structure in a grinding device for producing low-melting-point, washable polyester hot melt adhesive according to this utility model.

[0017] In the diagram: 1. Support base; 2. Grinding chamber; 3. Grinding assembly; 4. Crushing assembly; 5. Circular groove; 6. Nozzle; 601. Nozzle body; 602. Spring; 603. Baffle; 604. Guide chute; 605. Guide slide column; 7. Grinding chamber; 8. Air pump; 9. Nitrogen generator; 10. Feed inlet; 11. Discharge valve. Detailed Implementation

[0018] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0019] like Figure 1 and Figure 2 As shown, a grinding device for producing low-melting-point washable polyester hot melt adhesive includes a support base 1, on which a grinding chamber 2 is fixedly installed. The grinding chamber 2 has a grinding cavity 7, and a crushing component 4 and a grinding component 3 are arranged inside the grinding cavity 7. An annular groove 5 is provided between the crushing component 4 and the grinding component 3. Several nozzles 6 are fixedly installed in the annular groove 5. One side of the nozzles 6 is located in the grinding cavity 7. An air pump 8 is arranged on one side of the annular groove 5, and a nitrogen generator 9 is arranged on one side of the air pump 8. A feed inlet 10 is arranged on the upper side of the grinding chamber 2, and a discharge valve 11 is arranged on the lower side of the grinding chamber 2.

[0020] like Figure 3 As shown, in another embodiment of the present invention, the nozzle 6 includes a nozzle body 601, a spring 602 is fixedly installed at the air outlet of the nozzle body 601, and a baffle 603 is provided on the spring 602.

[0021] The nozzle body 601 is provided with a plurality of guide grooves 604 on the side near the baffle 603, and guide slide posts 605 are slidably disposed in the guide grooves 604.

[0022] When nitrogen enters the nozzle body 601, the nitrogen compresses the baffle 603, causing the baffle 603 to move away from the nozzle body 601. The spring 602 deforms, releasing the baffle 603 from the gas outlet of the nozzle body 601. The nitrogen is then sprayed through the nozzle body 601 to the grinding assembly 3, reducing the material temperature at the grinding assembly 3 and preventing softening, adhesion, agglomeration, and oxidation.

[0023] When nitrogen is no longer sprayed from the nozzle body 601, the nitrogen no longer compresses the baffle 603, the spring 602 rebounds, and the baffle 603 returns to its original position. The baffle 603 is then used to seal the gas outlet of the nozzle body 601 again, preventing the powder in the grinding chamber 7 from drifting into the nozzle body 601, maintaining the cleanliness of the inside of the nozzle body 601, and extending the service life of the nozzle body 601.

[0024] Working principle of a grinding device for producing low-melting-point, washable polyester hot melt adhesive:

[0025] In use, the material is first poured into the grinding chamber 7 through the feed inlet 10. Then, the crushing component 4 and the grinding component 3 (the structure and principle of the two have been described in detail in the comparative document, so they will not be described again here) are used to crush and grind the material in sequence. During this process, the nitrogen generated by the nitrogen generator 9 is sent into the annular groove 5 through the air pump 8. When the nitrogen is sent into the nozzle body 601 through the annular groove 5, the nitrogen squeezes the baffle 603, causing the baffle 603 to move away from the nozzle body 601. The spring 602 deforms, releasing the baffle 603 from the air outlet of the nozzle body 601. The nitrogen is then sprayed to the grinding component 3 through the nozzle body 601, reducing the material temperature at the grinding component 3 and preventing softening, adhesion, and agglomeration. At the same time, the inert gas (nitrogen) can also prevent the risk of dust explosion.

[0026] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. For those skilled in the art, other variations or modifications can be made based on the above description. It is impossible to exhaustively list all the implementation methods here. All obvious variations or modifications derived from the technical solutions of the present invention are still within the protection scope of the present invention.

Claims

1. A grinding device for producing low-melting-point washable polyester hot melt adhesive, comprising a support base (1), characterized in that: A grinding chamber (2) is fixedly installed on the support base (1). A grinding chamber (7) is provided on the grinding chamber (2). A crushing component (4) and a grinding component (3) are provided in the grinding chamber (7). An annular groove (5) is provided between the crushing component (4) and the grinding component (3). Several nozzles (6) are fixedly installed in the annular groove (5). One side of the nozzles (6) is located in the grinding chamber (7). An air pump (8) is provided on one side of the annular groove (5). A nitrogen generator (9) is provided on one side of the air pump (8). A feed inlet (10) is provided on one side of the upper part of the grinding chamber (2). A discharge valve (11) is provided on one side of the lower part of the grinding chamber (2).

2. The grinding device for producing low-melting-point washable polyester hot melt adhesive according to claim 1, characterized in that: The annular groove (5) is located on the grinding chamber (2), and the air pump (8) and nitrogen generator (9) are fixedly installed on the grinding chamber (2).

3. The grinding device for producing low-melting-point washable polyester hot melt adhesive according to claim 2, characterized in that: The nozzle (6) includes a nozzle body (601), and a spring (602) is fixedly installed at the air outlet of the nozzle body (601). A baffle (603) is provided on the spring (602).

4. The grinding device for producing low-melting-point washable polyester hot melt adhesive according to claim 3, characterized in that: The nozzle body (601) is provided with a plurality of guide grooves (604) on the side near the baffle (603), and guide slides (605) are slidably disposed in the guide grooves (604).

5. The grinding device for producing low-melting-point washable polyester hot melt adhesive according to claim 4, characterized in that: The baffle (603) is located outside the nozzle body (601), and the guide slide (605) is fixedly connected to the baffle (603).

6. The grinding device for producing low-melting-point washable polyester hot melt adhesive according to claim 5, characterized in that: Both the guide groove (604) and the guide column (605) are T-shaped.

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