Insert Molding

What is insert molding?

Insert molding refers to a molding process in which an integrated product is
made by inserting a pre-prepared metal material insert into a mould and then
injecting the plastic resin, and the molten material is bonded to the insert,
cooled and solidified.

Insert molding features are as follows:
1.The moldability and flexibility of plastic resins, as well as the rigidity,
strength and heat resistance of metal parts, create complex and sophisticated
metal-plastic integrated products.
2.In particular, the electrical product made by medical insert molding,
together with the insulation of the resin and the insert molding electronics,
can meet the basic functions of insert moulding products.
3.The pre-formed combination of multiple inserts makes the subsequent product
unit combination engineering more rational.
4.Inserts are not limited to metal, but also cloth, paper, wire, plastic,
glass, wood, wire, electrical parts and so on.
5.For the rigid molded product and the curved elastic molded product on the
rubber gasket plate, the parts by insert molding can eliminate the complicated
operation of installing the sealing ring, and help the subsequent process
automation.
6.Compare to the press-in molding, the metal insert gap can be designed to be
narrower, and the reliability of the composite product molding is higher as the
plastic resin is molten to wrapped with the metal insert.
7.Selecting the appropriate plastic resin and injection molding conditions,
even for products that are easily deformed or broken (such as glass, coils,
electrical parts, etc.), can be sealed and fixed by insert molding with plastic
resin.
8.Designed the appropriate mould construction, the insert can also be
completely enclosed in the plastic resin.
9.By the combination of a vertical injection molding machine and a robot,
insert arranging mechanism, most of the insert molding projects can be
automated.
10.The product with a hollow groove also can be made by insert molding after
the core hold treatment.

Automatic insert molding system design points:
1.The shrinkage rate of metal insert molding is not uniform, and the limit test
of the shape and dimensional accuracy of the important areas should be done in
advance.
2.The metal insert has the possibility of deformation and displacement during
the injection process, and the designer should be fully considered about mould
construction to help stabilize the metal insert. For products whose insert
shape cannot be changed, prior testing is indispensable.
3.Where the arrangement of the metal inserts is separated and the conveyor is
used, the contact between the metal inserts and the plastic and the vibrating
balls may cause slight damage to the surface of the insert, which may affect
the quality of the product, the quality tolerance limit should be confirmed in
advance.
4.The zigzag shape, the amount of warpage, the difference in material
thickness, the difference in diameter, and the difference in thickness due to
metal plating processing of the metal insert due to the press working should be
determined in advance. Carried out the design of the automation device and the
design of the mould structure on this basis.
5.Mould gate position, molding cycle time, etc., which are the key points of
the mould structure, are solved as much as possible or have corresponding
improvement solutions. 
6.It should be confirmed whether the metal insert needs to be preheated or
dried. The aim is to ensure the quality and stability of the molding.
7.The various testing devices installed in the mold are used to prevent the
molding action from being affected by environmental conditions such as heat,
force, vibration, etc., and it should be confirmed whether it is used or not.
8.Hanking Mould is a responsible insert molding companies in China and has
experience in manufacturing and supplying custom plastic injection molding
service for many years. Our production sites have been accredited the
certification of TS16949, ISO 14001 and ISO 9001, etc. We provide diverse
insert molding solutions for you. You can fully trust our production sites,
products and place your orders.


Hanking Mould Engineering Ltd. is a professional chinese injection molding
manufacturers, we provide hanking mould, industrial molds, insert moulding
products and etc. Want to know more? Please contact us.

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