How to Improve the Quality of Guardrail Net

With the rapid development of urban construction, the market has increasingly high requirements for guardrail products. In the past, all cities in China were all iron guardrails. Due to their uneven surfaces, easy corrosion, and high maintenance costs, birth defects have gradually been adopted by the market Eliminated, new products with wood and plastic as the main materials continue to emerge, but they still cannot meet the needs of the market. The rule of "survival of the fittest, elimination of the unsuitable" followed by human beings, through the revolution of the guardrail, has continuously produced new and excellent products. PVC coated welded wire mesh eventually became the king of the guardrail. The plastic-impregnated products are mainly made of metal and made of high-tech, high-molecular and high-density resin materials. But how to be invincible in the fence industry, we must fundamentally reduce the production cost of fence nets, and improve the quality of the impregnated fence nets.

The plastic-impregnated layer of the fence mesh has good adhesion, uniform color appearance, smooth feel, and no defects such as hanging flow, scorching, and cracks. The quality meets the standard requirements. But the uneven thickness of the impregnated plastic layer of the fence mesh is the biggest defect, followed by the presence of pinholes. Through the investigation of the current situation, we found that to reduce the cost of plastic impregnation of the fence net, the amount of plastic powder must be reduced, and the reduction of the amount of plastic powder must solve the problem of uneven thickness of the plastic impregnation layer.

Pvc Coated Mesh Panel Fencing

PVC coated mesh panel fencing production work, there are two main reasons for the problem: one is the uneven temperature in the furnace; because the temperature in the furnace is uneven, causing the fence to heat up The uneven temperature directly affects the thickness of the plastic powder during dip coating. The greater the temperature difference, the more obvious the thickness. The other is the small vibration force; because the fence mesh comes out of the fluidized bed after being dipped in plastic, the excess plastic powder still exists on the surface of the fence mesh, and the vibration force is small, and the excess plastic powder cannot vibrate, causing the plastic dipping layer to be too thick.

Effective countermeasures to improve the quality of plastic impregnated fence:

First, the heating temperature of the fence is measured. After repeated measurements, the average temperature of the frame on the fence is 256 ° C, the temperature on the lower frame of the fence is 312 ° C, and the temperature difference between the upper and lower reaches 56 ° C. The heating method of the heating furnace is that the burner sends heat from the bottom of the furnace into the furnace through the flue, and the upper part of the furnace is circulated by a circulation fan, so the temperature of the bottom of the furnace is higher. After repeatedly adjusting the valve angles of the upper and lower flues, the best effect was finally achieved. When the heating furnace was set at a temperature of 365 "C, the fence. The upper frame temperature was 272 ° C, and the lower frame temperature was 260 ° C, the temperature difference in the furnace drops to 12 ° C, which basically solves the problem of temperature difference. For the problem of small vibration force, first, replace the compression spring and adjust the vibration angle, but it has little effect on the increase of vibration force. Then increase the size of the cam. Started by increasing the size by 3mm, and then tried to increase the size of the cam by 5mmt and 8mm, and finally found that the effect is the best when the cam is increased by 10mm. When the cam is increased by 10mm, it can effectively vibrate the excess plastic powder attached to the fence.