CN-224224358-U - Heating nozzle structure for polyurethane foaming gun

CN224224358UCN 224224358 UCN224224358 UCN 224224358UCN-224224358-U

Abstract

The utility model discloses a heating nozzle structure for a polyurethane foaming gun, which belongs to the technical field of polyurethane high-pressure foaming production equipment and comprises a needle valve body, a nozzle head and a heating component, wherein the needle valve body consists of a needle valve shell, a needle valve stepped shaft, a disc spring, a positioning rod seat and a positioning nut, a liquid inlet hole is formed in the outer wall of the needle valve shell, a hollow rod body of the heating component penetrates through the positioning nut and the positioning rod seat in sequence and then is arranged in the needle valve stepped shaft in a penetrating manner, the front end of the hollow rod body is provided with a heating rod reaching a conical head arranged on the needle valve stepped shaft, the tail end of the hollow rod body is provided with a cover cap tightly matched with the needle valve shell, and the heating rod is connected with a wire penetrating into the hollow rod body and extending out of the cover cap. The utility model can provide proper heating for the nozzle head by integrating the heating component on the needle valve, and prevent the stock solution from solidifying or agglomerating at the taper hole, thereby effectively reducing the occurrence of blockage. Therefore, the working efficiency can be improved, the downtime is reduced, and the uniformity and stability of the foam can be ensured.

Inventors

WU JINLI
LIU YUE
SUN XUEWEI
LIAO YUJIE
DING MAOYU
WANG DAILIN
LIU SENYU
YUE ZIXUAN
HUANG JIEKAI

Assignees

重庆科技大学

Dates

Publication Date: 20260512
Application Date: 20250611
Priority Date: 20240701

Claims (6)

1. A heating nozzle structure for a polyurethane foaming gun is characterized by comprising a needle valve body and a nozzle head (1) which are detachably connected, wherein the needle valve body consists of a needle valve shell (2) and a needle valve stepped shaft (3), a disc spring (4), a positioning rod seat (5) and a positioning nut (6) which are sleeved in the needle valve shell (2), the needle valve shell (2) is of an axial hollow structure, the corresponding end facing the nozzle head (1) is in plug connection with the nozzle head (1), a taper hole (11) is arranged in the nozzle head (1), the large opening end of the taper hole (11) faces the needle valve shell (2), the needle valve stepped shaft (3) is provided with a conical head (31) which is matched with the needle valve stepped shaft (11) of the nozzle head (1) towards the front end of the nozzle head (1), the needle valve stepped shaft (3) is sequentially provided with the disc spring (4), the positioning rod seat (5) and the positioning nut (6) at the rear end facing away from the nozzle head (1), the positioning rod seat (5) is provided with a plurality of disc springs (51), the needle valve comprises a needle valve shell (2), a positioning nut (6) and a heating assembly (7), wherein the needle valve shell (2) is in threaded connection, a liquid inlet (21) is formed in the outer wall of the needle valve shell (2) and close to a nozzle head (1), a hollow rod body (71) of the heating assembly (7) sequentially penetrates through the positioning nut (6) and a positioning rod seat (5) and then penetrates into a needle valve stepped shaft (3), a heating rod (8) reaching a conical head (31) arranged on the needle valve stepped shaft (3) is arranged at the front end of the hollow rod body (71), a cover cap (72) tightly matched with the needle valve shell (2) is arranged at the tail end of the hollow rod body (71), and a wire (81) penetrating into the hollow rod body (71) and extending out of the cover cap (72) is connected to the heating rod (8).
2. The heating nozzle structure for polyurethane foaming gun according to claim 1, characterized in that the needle valve stepped shaft (3) is provided with a groove (32) for accommodating the disc spring (4) at a corresponding surface facing the disc spring (4), and a through hole (33) for penetrating a rod sleeve (51) of the positioning rod seat (5) is provided in the center of the groove (32).
3. The heating nozzle structure for polyurethane foam gun according to claim 1, characterized in that the plug connection between the needle valve housing (2) and the nozzle head (1) is a tight fitting structure.
4. The heating nozzle structure for a polyurethane foam gun according to claim 1, wherein the liquid inlet holes are obliquely formed in a plurality of rings in the circumferential direction of the needle valve housing (2).
5. The heating nozzle structure for a polyurethane foam gun according to claim 1, characterized in that an external thread (22) assembled with a valve seat (200) of a gun body (100) of the polyurethane foam gun is provided on the needle valve housing (2), and an internal thread (23) in threaded connection with the positioning nut (6) is provided on the needle valve housing (2).
6. The heating nozzle structure for polyurethane foaming gun according to any one of claims 1 to 5, wherein a temperature sensor (9) is arranged in the hollow rod body (71) and near the heating rod (8), and the temperature sensor (9) is connected with a signal wire (91) penetrating through the hollow rod body (71) and extending out of the cap (72).

Description

Heating nozzle structure for polyurethane foaming gun Technical Field The utility model belongs to the technical field of polyurethane foaming production equipment, and provides a heating nozzle structure for a polyurethane foaming gun. Background The polyurethane foaming machine is special equipment for filling and foaming polyurethane foam plastics. As long as the performance index of the polyurethane component raw materials meets the formula requirement, the uniform and qualified foam product can be produced by the equipment. The polyurethane foaming machine can be used for automobile interior decoration, heat preservation wall spraying, heat preservation pipeline manufacturing, processing of bicycle and motorcycle saddle sponge and the like. As one of the production facilities of polyurethane foam materials, the performance level of a polyurethane high-pressure foaming machine and its technical index determine the overall level of such facilities. However, in the spraying process of treating the stock solutions of polyurethane A and B, the conventional spray gun of the polyurethane foaming machine has certain limitation, namely, the fluidity of the spray nozzle is poor, and the blocking condition is often caused, so that the mixing effect is not satisfactory, the working progress and the quality are seriously affected, and the ever-increasing production requirements of high quality and high efficiency are difficult to meet. The current situation is urgent to need a new technical scheme to break through the existing bottleneck and realize better performance. Disclosure of utility model Accordingly, the present utility model is directed to a heating nozzle structure for polyurethane foaming gun, which solves the problem of easy blocking of the nozzle. In order to achieve the above purpose, the present utility model provides the following technical solutions: The utility model provides a heating nozzle structure for a polyurethane foaming gun, which comprises a needle valve body and a nozzle head which are detachably connected, wherein the needle valve body consists of a needle valve shell, a needle valve stepped shaft, a disc spring, a positioning rod seat and a positioning nut, the needle valve stepped shaft, the disc spring and the positioning rod seat are sleeved in the needle valve shell, the heating nozzle structure is simple in structure and easy to assemble and disassemble, the needle valve shell is of an axial hollow structure, the corresponding end facing the nozzle head is connected with the nozzle head in an inserting mode, a taper hole is formed in the nozzle head, the large opening end of the taper hole faces the needle valve shell, the front end of the needle valve stepped shaft facing the nozzle head is provided with a taper head matched with the taper hole of the nozzle head, the needle valve stepped shaft is sequentially provided with a disc spring, a positioning rod seat and a positioning nut at the rear end facing away from the nozzle head, the positioning rod seat is sleeved with a plurality of disc springs, the positioning nut is in threaded connection with the needle valve shell, the outer wall of the needle valve shell is provided with a liquid inlet hole close to the nozzle head, the hollow rod body of the heating assembly penetrates through the positioning nut and the positioning nut in the step shaft at the back of the corresponding end facing the nozzle head, the large opening end of the taper hole is arranged at the front end of the hollow rod body, the hollow rod body reaches the hollow rod body is matched with the hollow cap, the needle valve is prevented from being blocked, and the needle valve is prevented from being solidified, and the hollow rod is prevented from being connected with a wire rod cap. Through the design, the polyurethane foaming gun can work more stably, the occurrence of blockage problems is effectively prevented, and the production efficiency and the product quality are improved. The heating nozzle design has good application prospect in the field of polyurethane foam plastic production. Optionally, the needle valve stepped shaft is provided with a groove for accommodating the disc spring on a corresponding surface facing the disc spring, and a through hole for positioning a rod sleeve of the rod seat is arranged in the center of the groove. The design ensures that the disc spring can be accurately arranged at the rear end of the needle valve stepped shaft and is connected to the rod sleeve of the positioning rod seat through the through hole, so that the stable and fixed and correct working position of the disc spring is ensured, the buffering shock absorption and pre-tightening anti-loosening effects of the disc spring can be achieved, the assembly efficiency of the needle valve stepped shaft and the disc spring can be improved, the stability and the reliability of equipment can be improved, and the performance and the working efficiency of the whole po