PUR (Polyurethane) hot-melt particle adhesive reaction kettle

Abstract

The utility model relates to a PUR (Polyurethane) hot-melt granular adhesive reaction kettle which comprises a kettle body and a kettle cover which are connected by a flange, wherein a stirring shaft extending into the kettle body is arranged on the kettle cover through a bearing and a mechanical seal, the stirring shaft is provided with a stirring paddle, a water jacket is welded on the outer wall of the kettle body, the water jacket is provided with a water inlet and a water outlet, and a thermal insulation material layer is coated on the outer wall of the water jacket; the stirring shaft is a hollow shaft, a heating rod is inserted into a shaft cavity, a lead of the heating rod is led out from the top end of the stirring shaft and connected with a power supply, and the stirring shaft is driven by a speed reducing motor mounted on the kettle cover through a chain wheel and chain belt assembly; a scraping strip is vertically welded at the tail end of the stirring paddle and is in clearance fit with the inner wall of the kettle body; and a hanging ring is fixedly arranged on the kettle cover. Compared with the existing similar products, the PUR hot-melt granular adhesive reaction kettle has better heating and stirring effects on adhesive in the kettle, and the quality and the production efficiency of adhesive products can be remarkably improved; meanwhile, a large amount of sizing materials can be prevented from adhering to the inner wall of the kettle body, the cleaning period of equipment is prolonged, and the cleaning workload is relieved.

Description

Technical Field

[0001] This utility model relates to the field of reaction vessel equipment technology, and in particular to a PUR hot melt granular adhesive reaction vessel. Background Technology

[0002] PUR hot melt adhesive, also known as moisture-curing reactive polyurethane hot melt adhesive, is mainly composed of isocyanate-terminated polyurethane prepolymer. PUR hot melt adhesive offers adjustable adhesion and toughness (elasticity), and boasts excellent bond strength, temperature resistance, chemical corrosion resistance, and aging resistance, making it one of the most important products in the adhesive industry.

[0003] Traditional stirred reactors for producing PUR hot melt granular adhesive use heating tubes inside the reactor to heat the adhesive. However, due to the large capacity of the reactor and the slow heating speed of the heating tubes, the overall heating of the adhesive is not uniform, which can easily affect the quality of the finished adhesive. Moreover, after the adhesive is discharged, a significant amount of adhesive easily remains and adheres to the inner wall and bottom of the reactor. If the accumulated adhesive is not cleaned in time, it will solidify into lumps, affecting the working performance of the reactor equipment. However, the structure of such reactor equipment is mostly quite special, making cleaning operations extremely inconvenient, thus affecting production. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a PUR hot melt granular adhesive reactor to overcome the defects of the prior art and products as described in the background art.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows: a PUR hot melt granular adhesive reaction vessel, including a vessel body and a vessel cover connected by a flange, a stirring shaft extending into the vessel body is installed on the vessel cover through bearings and a mechanical seal, the stirring shaft has a stirring paddle, a water jacket is welded to the outer wall of the vessel body, the water jacket has inlet and outlet water ports, and the outer wall of the water jacket is covered with a heat insulation material layer; the stirring shaft is a hollow shaft, a heating rod is inserted into the shaft cavity, the wire of the heating rod is led out from the top of the stirring shaft and connected to a power source, the stirring shaft is driven by a reduction motor installed on the vessel cover through a sprocket and chain assembly; a scraper is vertically welded to the end of the stirring paddle, the scraper is clearance-fitted with the inner wall of the vessel body; a lifting ring is fixedly installed on the vessel cover.

[0006] Furthermore, through holes I and triangular protrusions are formed at intervals on the scraper.

[0007] Furthermore, an auxiliary stirring paddle is connected near the lower end of the stirring shaft, and an auxiliary scraper is welded to the end of the auxiliary stirring paddle. The auxiliary scraper is in clearance fit with the bottom of the vessel body.

[0008] Furthermore, through holes II are formed at intervals on the secondary scraper.

[0009] The beneficial effects of this utility model are as follows: Compared with existing similar products, this PUR hot melt granular adhesive reactor heats the adhesive material inside the reactor more rapidly and evenly, and the stirring reaction effect is better, which can significantly improve the quality of the adhesive product and the production efficiency; at the same time, it can prevent a large amount of adhesive material from adhering to the inner wall of the reactor during production, so that the adhesive material is discharged from the reactor as much as possible, thereby greatly extending the cleaning cycle of the equipment and reducing the burden of cleaning operations; the openable design of the reactor body and lid makes cleaning operations easier. Attached Figure Description

[0010] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0011] Figure 1 This is a schematic diagram of the main structure of this utility model (partial cross-section);

[0012] Figure 2 This is a side view (sectional view) of the scraper blade of this utility model.

[0013] In the figure: 1. Vessel body; 2. Vessel lid; 3. Stirring shaft; 4. Stirring paddle; 5. Water jacket; 6. Insulation material layer; 7. Heating rod; 8. Gear motor; 9. Scraper; 9-1. Through hole I; 9-2. Triangular protrusion; 10. Secondary stirring paddle; 11. Secondary scraper; 12. Lifting ring. Detailed Implementation

[0014] A PUR hot melt granular adhesive reactor, such as Figure 1 As shown, it includes a vessel body 1 connected by a flange and a vessel cover 2. A stirring shaft 3 extending into the vessel body 1 is installed on the vessel cover 2 via bearings and a mechanical seal (i.e., mechanical seal). The stirring shaft 3 has a stirring paddle 4. A water jacket 5 is welded to the outer wall of the vessel body 1. The water jacket 5 has inlet and outlet water ports. The outer wall of the water jacket 5 is covered with a heat insulation material layer 6. The stirring shaft 3 is a hollow shaft. A heating rod 7 is inserted into the shaft cavity. The wire of the heating rod 7 is led out from the top of the stirring shaft 3 and connected to a power source. The stirring shaft 3 is driven by a reduction motor 8 installed on the vessel cover 2 via a sprocket and chain assembly. A scraper 9 is vertically welded to the end of the stirring paddle 4. The scraper 9 is clearance-fitted with the inner wall of the vessel body 1. A lifting ring 12 is fixedly installed on the vessel cover 2.

[0015] During operation, the reactor can be circulated with hot water (or oil, with the water or oil temperature determined according to actual needs) into the water jacket 5 on the outer wall of the reactor body 1 to assist in rapid and uniform heating within the reactor body 1. Simultaneously, the heating rod 7 inside the hollow stirring shaft 3 assists in rapid and uniform heating within the reactor body 1 by conducting heat energy to the stirring shaft 3 and the stirring paddle 4. Through simultaneous external and internal auxiliary heating, the rubber material inside the reactor can be rapidly and uniformly heated while being stirred, greatly improving the reaction rate and reaction effect, thereby significantly improving the quality of the rubber product and production efficiency.

[0016] During the mixing process, the scraper 9 at the end of the mixing paddle 4 can effectively prevent a large amount of adhesive from sticking to the wall, allowing the adhesive to be discharged from the vessel 1 as much as possible, thereby greatly extending the equipment cleaning cycle and reducing the cleaning workload.

[0017] When cleaning the reactor equipment is required, after disconnecting the reactor body 1 from the reactor cover 2, the reactor cover 2 (along with the stirring shaft 3) can be lifted off the reactor body 1 using a gantry crane, allowing both to be cleaned separately. After cleaning, the reactor cover 2 can be lifted back onto the reactor body 1. This greatly reduces the difficulty of the cleaning operation.

[0018] See Figure 2 Through holes I 9-1 and triangular protrusions 9-2 are formed at intervals on the scraper 9. The presence of through holes I 9-1 and triangular protrusions 9-2 can enhance the fluidity of the rubber compound when it is stirred, improve the stirring effect, and also help reduce stirring resistance.

[0019] In order to enhance the stirring reaction effect of the adhesive material near the bottom of the vessel body 1 and prevent a large amount of adhesive material from sticking to the bottom of the vessel body 1, an auxiliary stirring paddle 10 is connected near the lower end of the stirring shaft 3. An auxiliary scraper 11 is welded to the end of the auxiliary stirring paddle 10. The auxiliary scraper 11 is in clearance fit with the bottom of the vessel body 1, and through holes II are formed at intervals on the auxiliary scraper 11.

[0020] The above embodiments are only used to explain the present utility model and are not intended to limit the protection of the present utility model. Any non-substantial modifications made based on the essential solution of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A PUR hot melt granule reactor, characterized in that: The utility model relates to a kind of agitator, including flange connection kettle body (1), kettle cover (2), and the agitator shaft (3) of being installed with being inserted into kettle body (1) by bearing and machine seal on kettle cover (2) is passed, agitator shaft (3) is equipped with stirring paddle (4), water jacket (5) is welded on the outer wall of kettle body (1), water jacket (5) is equipped with inlet and outlet, and heat insulation material layer (6) is coated on the outer wall of water jacket (5);The agitator shaft (3) described in is hollow shaft, heating rod (7) is inserted in the axle cavity, and the wire of heating rod (7) is led out from the top end of agitator shaft (3) and is connected power supply, and agitator shaft (3) is driven by reduction motor (8) installed on kettle cover (2) by chain wheel chain belt component;Vertical welding is formed on the end of the stirring paddle (4) scraper strip (9), and scraper strip (9) is gap matched with kettle body (1) inner wall;Lifting ring (12) is fixedly arranged on kettle cover (2).

2. The PUR hot melt granule reactor of claim 1, wherein: Through hole I (9-1) and triangular convex (9-2) are formed on the scraper strip (9) described in interval.

3. The PUR hot melt pellet reactor of claim 1, wherein: Sub-agitating paddle (10) is also connected near the lower end position of the agitator shaft (3), and sub-scraping strip (11) is welded on the end of sub-agitating paddle (10), and sub-scraping strip (11) is gap matched with kettle body (1) inner bottom.

4. The PUR hot melt pellet reactor of claim 1, wherein: Through hole II is formed on the sub-scraping strip (11) described in interval.

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