Insert molding refers to inserting a resin into a mold after inserting a pre-prepared, non-material insert. The molten material is then bonded to the insert and solidified to form an integrated product. The base body is injection-molded on the surface of the metal plate. Molding pieces embedded engineering method.
Its characteristics are as follows:
1. The combination of easy moldability, bending property and metal rigidity, strength and heat resistance can make a complex and delicate metal-plastic integrated product.
2, In particular, the use of a combination of resin insulation and metal conductivity, the molded products can meet the basic functions of electrical products.
3, The pre-molding combination of multiple inserts makes the post-engineering of the product unit combination more rational.
4. Inserts are not limited to metal, but also cloth, paper, wires, plastics, glass, wood, wire rods, electrical parts, etc.
5, For the rigid molded products, the flexible elastic molded products on the rubber gasket plate can be integrated into the base body by injection molding to eliminate the complicated operation of arranging and sealing the cassette, which makes the automation of the post process easier.
6, because it is a fusion of the molten material and the metal insert, compared with the press-in molding method, the gap of the metal insert can be designed more narrowly, and the reliability of the composite product molding is higher.
7, select the appropriate resin and molding conditions, that is, for easy to break the shape of the product (such as glass, coils, electrical parts, etc.), through the resin can also be sealed and fixed.
8, select the appropriate mold structure, inserts can also be completely enclosed in the resin.
9. The combination of vertical injection molding machine and manipulators, inserts, and other devices, and insert molding engineering can realize automatic production.
10, after the insert molding, after core hole processing, can also be made of hollow hollow groove products.
Automatic Insert Molding System Design Selection Notes:
1, metal insert molding prone to molding shrinkage is not uniform, should be done in advance important parts of the shape, dimensional accuracy of the limit test.
2. The metal inserts are easily deformed and displaced during the injection process. Full consideration should be given to the design of the mold and the design of the mold shape that can easily retain the metal inserts. Prior testing is indispensable for products whose insert shape cannot be changed.
3, When the metal inserts are arranged and separated and the conveyor is used, the contact between the metal inserts and the inserts and the vibrating ball will cause the surface of the inserts to be slightly damaged, which will affect the product quality. The quality must be confirmed in advance. Allowable limit range.
4. It is necessary to determine in advance the zigzag shape, warpage amount, material thickness difference, difference in diameter, and thickness difference caused by metal processing due to stamping of the metal insert. Based on this, the matching design of the automatic device and the mold structure are performed. the design of.
5, The mold gate position method, the molding cycle, etc., restrict the predictable matters of the mold structure, and solve as much as possible in advance or have corresponding improvement measures.
6, should confirm whether the metal insert needs to be preheated or dried. The purpose is to ensure product quality and molding stability.
7. All kinds of detection devices installed in the mold are used to ensure the stability of the molding action under the influence of environmental conditions such as heat, force, vibration, etc., and should be confirmed.