Hits:Updated:2020-03-20 15:03:46【Print】
The liquid dipping process mainly includes 5 steps: preheating, dipping, plasticizing, cooling, and demolding. After the product is post-processed (tail-cutting), it becomes a finished product, and finally it is packed and shipped. Plastic dipping protective cover (cap) is completed in 8 steps from processing to product storage.
1. Warm up:
Put the mold into the oven, and let the mold absorb the heat, so that the plastisol will adsorb on the surface of the hot mold when dipping, the size of the mold and the type of plastisol are different, and the preheating temperature and time are also different.
2. Dip:
The pre-heated mold is immersed in plastisol. Generally, the immersion speed is ≤10mm / s, and the mold lifting speed is ≤5mm / s. The dipping time is set according to the size of the mold and the thickness of the product, and is generally controlled between 1 and 60 seconds.
3． Plasticizing: The mold that has been soaked is sent into the oven, and the mold and the attached plastisol are heated to plasticize the plastisol. The plastification temperature and time are set according to the mold material, volume size, and product hardness and thickness. Generally, the plasticizing temperature is 200-350 ℃, and the plasticizing time is 10-90s. 4． cool down: The plasticized mold leaves the oven, and the temperature is lowered to bring the molded product into a normal temperature state. The cooling method includes water cooling and air cooling. 5． Demoulding: Remove the molded product attached to the mold. The demolding method usually uses compressed air to blow off. 6. Post-processing: For the required products, for example, the terminal insulation jacket needs to be cut off, and the connector's protective cap is not needed. 7. Inspection The surface color of the finished product should be consistent, and there are no defects such as mottled color, particles, flow marks, exposed bottoms, plastic layer peeling, pinholes, bubbles, cracks, etc., and the quality inspection is performed according to different standards of different customers. 8. package Product packaging should be stable to avoid abrasions during shipping. |
