Unlock instant, AI-driven research and patent intelligence for your innovation.

Spray gun nozzle for spraying and fusing thermoplastic powder

A thermoplastic, powder technology, applied in the direction of injection device, injection device, liquid injection device, etc., can solve the problems of discoloration, affecting product quality, powder precipitation, etc.

Active Publication Date: 2016-11-16
BEIJING FORESTRY UNIVERSITY
View PDF8 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Using a powder spray gun to spray plastic powder onto the surface of the material can solve the problem of uniform paving, but when the raw materials of the composite material are further mixed, it will also cause the problem of powder precipitation and accumulation, which will still cause uneven paving
The flame formed by the combustion gas is used to heat the plastic powder to a molten state and spray it onto the surface of the workpiece to form a coating. Although the plastic powder can be paved on demand to a certain extent, the coating formed at this time is dispersed. The final layer deviates from the original intention of using plastic powder, and because the direction and temperature of the flame are not well controlled, there will be defects such as odor or discoloration when the plastic powder burns, which will affect the quality of the product
[0004] Therefore, in the prior art, the method of using the flame formed by the combustion gas to heat the plastic powder to a molten state and spray it onto the surface of the workpiece cannot be directly applied to the manufacture of composite materials. Spray gun nozzle for thermoplastic powder melting to avoid defects such as discoloration, denaturation, and burning of plastic powder due to concentrated heat or flame burning

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Spray gun nozzle for spraying and fusing thermoplastic powder
  • Spray gun nozzle for spraying and fusing thermoplastic powder
  • Spray gun nozzle for spraying and fusing thermoplastic powder

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0033] Specific Embodiment 1: Combining figure 1 and figure 2 Describe this embodiment, a thermoplastic powder spray gun spray nozzle described in this embodiment has a powder conveying section 1, a powder melting section 2 and a droplet ejection section 3, and is characterized in that: the powder conveying section 1 and the The powder melting section 2 is connected, the powder melting section 2 is connected to the droplet ejection section 3, the powder conveying section 1 has an air flow hole 11 and an air flow nozzle 12, and the powder melting section 2 has a cavity wall 21, a heating device 22 and the melting cavity 23 surrounded by the cavity wall 21 and the heater 22; the air flow hole 11 is connected to the melting cavity 23 of the powder melting section 2 through the air flow nozzle 12; the liquid The drop ejection section 3 has a connecting portion 31 and a liquid ejection head 32, one end of the melting cavity 23 is connected to the connecting portion 31, the connec...

specific Embodiment approach 2

[0035] Specific Embodiment 2: Combining figure 2 , image 3 , Figure 4 and Figure 5 Describe this embodiment, a thermoplastic powder spray gun nozzle described in this embodiment, the air flow hole 11 has a main air flow channel 13, a flow expansion channel 14, an entrainment nozzle 15, a curved wall surface 16 and a flow cavity 17. The entrainment nozzle 15 is located at the intersection of the main flow channel 13 and the diffuser channel 14, the entrainment nozzle 14 is adjacent to the curved wall surface 16, and the curved wall surface 16 surrounds The advection cavity 17 is synthesized, and the advection cavity 17 is connected with the air flow nozzle 12; other is the same as that of the specific embodiment 1.

[0036] The technical effect of this embodiment is: by setting the main flow channel 13, the flow expansion channel 14, the entrainment nozzle 15, the wall surface 16 and the flow chamber 17 in the powder conveying section, the surrounding area of ​​the flow ...

specific Embodiment approach 3

[0037]Embodiment 3: Combining Figure 4 , Figure 5 , Figure 6 and Figure 7 Describe this embodiment, a thermoplastic powder spray gun nozzle described in this embodiment, the powder conveying section 1 is composed of an air intake part 18 and an air mixing part 19 Components 19 are nested and connected, and the powder conveying section 1 is connected to the powder melting section 2 through the gas mixing component 19; the inlet component 18 is provided with a main flow channel inlet 131 and a diffuser channel inlet 141, There is a main airflow chamber 132 and an entrainment nozzle 15 between the air mixing part 19 and the air intake part 18. Air enters the main airflow chamber 132 through the main airflow channel inlet 131 and is ejected through the entrainment nozzle 15, and the airflow is ejected During the process, the air near the entrance 141 of the diffuser channel is entrained by the air ejected from the main airflow chamber; the air mixing part 19 is provided wit...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a spray gun nozzle for spraying and fusing thermoplastic powder, so as to solve the problem of difficulty in dispersion and fusing of plastic powder in the prior art. The spray gun nozzle is provided with a powder conveying section, a powder fusing section and a droplet spraying section, wherein the powder conveying section is connected with the powder fusing section, the powder fusing section is connected with the droplet spraying section, the powder conveying section is provided with an airflow through hole and an airflow nozzle, and the powder fusing section is provided with a cavity wall, a heater and a fusing cavity enclosed by the cavity wall and the heater; fused thermoplastic is sprayed through the spray nozzle. The spray gun nozzle has the beneficial effects that the plastic powder can be fused in the powder fusing section and is sprayed into uniform liquid plastic particles through the droplet spraying section, the uniform dispersion of the fused plastic powder can be realized, and the defects of discoloration, nature change, burning and the like of the plastic powder burnt by flames are overcome.

Description

technical field [0001] The invention relates to the field of material processing, in particular to a spray gun nozzle for thermoplastic powder melting. Background technique [0002] Plastic has become the most frequently used material in people's daily life. Plastics that have been continuously improved with technological progress are widely used in construction parts, food containers, household appliances, electrical casings, and aerospace vehicles. In recent years, , Plastics have begun to be used in the manufacture of functional composite materials and other occasions. In the processing and manufacturing of functional composite materials, plastic powder with small particles is used. Because of the small size of plastic powder particles, it is often impossible to pave according to the purpose of use in actual use. In the preparation of composite materials, plastic powder will be deposited at the bottom of the composite raw material mixture due to gravity, resulting in une...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): B05B7/16B05B1/06B05B1/30
CPCB05B1/06B05B1/30B05B7/168
Inventor 漆楚生于志明张扬母军张德荣赵博识
Owner BEIJING FORESTRY UNIVERSITY