Bonding technique of phenolic plastic powder with metal inserts in forming process

Abstract

The invention relates to a bonding technique of phenolic plastic powder with metal inserts in the forming process, which is characterized by comprising the following steps: carrying out sand blasting on the bonded metal surface, washing with gasoline, coating glue liquor once, baking in a baking oven at 150+ / -5 DEG C for 30+ / -5 minutes, and taking out; coating the glue liquor twice, and air-cooling at room temperature for 30 minutes; and putting the metal insert obtained in step 2 in a die cavity, adding phenolic plastic powder, and forming by using a pressure forming technique, wherein the preheating temperature of the die is the same as that of the metal insert. The bonding technique of the phenolic plastic powder with metal inserts in the forming process can ensure that the plastics are firmly bonded with the metal; and in the forming process, the resin can react with an intermediate agent, and the intermediate agent can react with the metal, thereby finally forming the chemical bonds and ensuring the bonding strength and the product quality.

Description

technical field [0001] The invention relates to a bonding process between phenolic plastic powder and metal inserts during the molding process. The surface of the metal inserts is treated by sand blowing, and then adhesive is applied according to the operation process. Background technique [0002] The traditional bonding technology is the bonding of the surface of the plastic product and the metal surface. The bonding process is to treat the two bonding surfaces with chemical and mechanical methods, and then apply glue, pressurize, and heat when necessary, so that To achieve the purpose of bonding plastic to metal. [0003] And when the structure of the product does not allow such a processing method, it is necessary to find an adhesive that can be directly bonded during the molding process, so as to achieve bonding during the molding process. Ordinary adhesives generally have high viscosity and are not easy to operate. The adhesive layer has a thickness after coating, and...

AI Technical Summary

Problems solved by technology

Ordinary adhesives generally have high viscosity and are not easy to operate. The adhesive layer has a thickness after coating, and it belongs to the overall curing, that is, it can be cured under certain temperature and time conditions. When plastic pressing, the raw materials flow under the action of heat and pressure. Impact the applied glue to mix the glue into the resin, resulting in inconsistency of color on the surface of the parts due to the mixing of glue, which reduces the appearance quality. Adhesive strength

[0004] As we all know, ①The traditional plastic and metal inserts are directly formed. In order to prevent the rotation and movement of the metal inserts, grooves, knurling, milling, etc. can be processed on the metal inserts. The combination of plastic and metal inserts It belongs to mechanical adhesion and cannot withstand large friction and impact. If it is impacted, it will easily cause relative movement between the plastic and the metal substrate, so it cannot meet the requirements of the product.